AU2013407641B2 - Dew point reduction system - Google Patents
Dew point reduction system Download PDFInfo
- Publication number
- AU2013407641B2 AU2013407641B2 AU2013407641A AU2013407641A AU2013407641B2 AU 2013407641 B2 AU2013407641 B2 AU 2013407641B2 AU 2013407641 A AU2013407641 A AU 2013407641A AU 2013407641 A AU2013407641 A AU 2013407641A AU 2013407641 B2 AU2013407641 B2 AU 2013407641B2
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- AU
- Australia
- Prior art keywords
- enclosure
- control unit
- environmental control
- air
- panels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Disclosed is a system for reducing dew point in the vicinity of cryogenic piping comprising an enclosure arranged to enclose cryogenic piping, an environmental control unit and a plurality of gas detectors. The environmental control unit being arranged to pressurise the enclosure, as well as, lowering the relative humidity within the enclosure such that the dew point is reduced to a temperature at which condensation forming on the cryogenic piping is substantially retarded.
Description
“DEW POINT REDUCTION SYSTEM’’
FIELD OF THE INVENTION [001] The present invention relates to a system and method for conducting works on cryogenic piping through the reduction of the effective dew point in the vicinity of cryogenic piping.
BACKGROUND OF THE INVENTION [002] Modern industrial applications commonly use what are known as cryogenic piping for transporting gases from location to location. Cryogenic piping is piping that operates at very low temperatures, normally below -5 degrees Celsius.
[003] Cryogenic piping is often used in the oil in gas industry, where gas is transferred from holding tank to holding tank or for processing. As cryogenic piping operate at temperatures at or below freezing, water vapour will condense on the outer surface of the piping. Where the cryogenic piping operates at temperatures below freezing, ice forms on the exterior of the piping.
[004] Dew point is the temperature, when at constant barometric pressure, that water vapour condenses at the same rate as it evaporates. A lower dew point demonstrates a lower temperature at which the rate of condensation and evaporation are equal. If an item is at a lower temperature then the dew point, condensation will form on the item.
[005] To combat the condensation of water vapour onto cryogenic piping, pipework regularly comprises of insulation on the exterior of the piping to prevent the presentation of a surface in to which condensation is generated.
WO 2015/085343
PCT/AU2013/001448
The insulation employed normally takes the form of a laminate, multiple material, coating aimed at preventing heat transfer from the pipe to the environment. The insulation effectively allows the outside of the pipe to be at closer to ambient temperature, thereby substantially preventing condensation of water vapour on the pipe.
[006] It must however be understood that dependent on the environmental and operating conditions that the cryogenic piping is exposed to, that instead of water simply condensing on the cryogenic piping, that instead the water condenses on the pipe and then crystalises to form ice.
[007] Ice formation is a particular problem, a pipe which is covered in ice is places under constant load and conditions which can cause a reduction in fatigue life and in extreme cases failure of the pipe. As ice forms on the exterior of the pip, the compressive load placed on the pipe by the ice may cause the pipe to fail. Additionally, the formation of ice on the exterior of the pipe may also cause a similar formation of ice on the interior of the pipe, which has been known to cause failure in pipes due to blockage.
[008] If as a result of the normal maintenance schedule or in response to some condition, the insulating covering needs to be removed from the cryogenic piping the problem of condensation and ice formation are accelerated. Where condensation is occurring this leads to issues with water run-off, either with water pooling or running off and affecting other areas. If the dew point is low enough ice quickly forms on the exterior of the pipe, the ice effectively preventing any work on the affected area of pipe.
[009] As such it is normal practice to effectively shut down the area where work is to be affected, such that the piping can return to ambient temperature before maintenance or other works are undertaken. As will be appreciated, having to shut down the area of a plant is an expensive undertaking that should be avoided.
WO 2015/085343
PCT/AU2013/001448 [0010] The present invention attempts to overcome at least in part the aforementioned disadvantages of previous systems and methods of conducting works on cryogenic pipes.
SUMMARY OF THE INVENTION [00111 In accordance with one aspect of the present invention there is provided a system for reducing dew point in the vicinity of cryogenic piping comprising an enclosure arranged to enclose cryogenic piping, an environmental control unit and a plurality of gas detectors, characterised in that the environmental control unit is capable of pressurising the enclosure, as well as, lowering the relative humidity within the enclosure such that the dew point is reduced to a temperature at which condensation forming on the cryogenic piping is substantially retarded.
[0012] Preferably, the system further comprises a recirculation unit for drawing air from within the enclosure and recirculating it into the inlet for the environmental control unit.
[0013] More preferably, the system further comprises an electrostatic discharge system.
[0014] Even more preferably, the system further comprises a means for reducing the temperature within the enclosure.
[0015] In accordance with a preferred embodiment, the system further comprises a plurality of pressurised enclosures arranged to enclose any of the components of the system.
[0016] Preferably, the environmental control unit further comprises a means for controlling the temperature within the enclosure.
WO 2015/085343
PCT/AU2013/001448 [0017] Preferably, the enclosure comprises a plurality of panels.
[0018] More preferably, the plurality of panels are arranged to engage in a non-airtight manner.
[0019] Even more preferably, a constant emission of air occurs between the engagements of each of the panels to substantially prevent ingress of gas into the enclosure.
[0020] Preferably, the recirculation unit further comprises a means for reducing the relative humidity of air passing through the recirculation means.
[0021] The system may also comprise an electrostatic discharge system comprising a discharge mat which is arranged to form or is on the floor of the enclosure.
[0022] Preferably, the electrostatic discharge system further comprises a plurality of discharge points arranged within the enclosure, the discharge points arranged to enable the connection of machinery and personal to electrical ground.
[0023] The electrostatic discharge system may further comprises a discharge means arranged at each ingress or egress points of the enclosure to prevent machinery and personal entering or leaving the enclosure from carrying electrostatic charge.
[0024] The system may comprise means for reducing temperature within the enclosure is arranged to draw air from within the enclosure and after cooling deposit air within the enclosure.
[0025] Preferably, the separate enclosures comprises a plurality of panels
WO 2015/085343
PCT/AU2013/001448 arranged to engage in a non-airtight manner.
[0026] More preferably, a constant emission of air occurs from engagement of each of the panels to substantially prevent egress of gas into the separate enclosure.
[0027] Preferably, the environmental control unit is capable of raising the temperature within the enclosure.
[0028] Preferably, the environmental control unit comprises a desiccant rotor.
BRIEF DESCRIPTION OF THE DRAWINGS [0029] The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
[0030] Figure 1 is a block diagram of a system in accordance with the present invention [0031] Figure 2 is a block diagram of the system of figure 1 further comprising a sublimation unit [0032] Figure 3 is a block diagram of the system of figure 2 further comprising a recirculation means.
[0033] Figure 4 is a block diagram of the system of figure 3 further comprising an electrostatic discharge system.
[0034] Figure 5 is a block diagram of the system of figure 4 further comprising a separate enclosure arranged to enclose the environmental control unit.
DETAILED DESCRIPTION OF THE INVENTION [0035] Referring to the Figures, there is shown a system 10 for reducing the dew point in the vicinity of cryogenic piping. In accordance with this exemplary embodiment of the invention the system 10 comprises an enclosure 12, an environmental control unit 14 and a plurality of gas detectors 18.
Clean AiM4W^ty)1448 Received 11/09/2015 [0036] The enclosure 12 is preferably arranged to comprise a plurality of panels
20, which are arranged to engage such that interconnection between each panel 20 forms a non-airtight seal between engaging panels. Preferably, the panels 20 are arranged such that there are interconnecting primary and secondary fasteners that engage in a complementary manner.
[0037] The panels 20 are brought into close abutting contact with each other to form the enclosure 12 around the cryogenic piping. Preferably, the enclosure 12 would be formed such that sufficient room is provided to allow work to be comfortably undertaken. The arrangement of the panels 20 is dependent on the particular deployment being undertaken and will change as required. If required the enclosure 12 may be arranged to enclose a number of pipes, including those not requiring to be worked upon, to ensure sufficient space within the enclosure for necessary work to be completed.
[0038] Preferably, the panels are of the type disclosed in Australian Patent Application Number 2012205257.
[0039] The system 10 also comprises a plurality of gas detectors 18, preferably, the gas detectors are arranged at a number of locations throughout the system. The gas detectors 18 act to detect hazardous vapours that may have entered the enclosure. By way of example, when the enclosure is situated in the vicinity of an LNG facility, a plurality of gas detectors 18 capable of detecting LNG will be arranged to prevent the incidental egress of LNG into the enclosure. However, it should be appreciated that gas detectors 18 may be capable of detecting a number of different gases in their vicinity.
[0040] Preferably, the gas detectors 18 also comprise an alarm system such as a siren, which sounds in the event of the detection occurring.
AMENDED SHEET
WO 2015/085343
PCT/AU2013/001448 [0041] More preferably, the plurality of gas detectors 18 are arranged to communicate wirelessly with each other. In the event that any of the plurality of detectors 18 detect unwanted gasses, the alarms associated with each of the plurality of detectors 18 being arranged to sound to ensure that all personal are aware of the ingress of unwanted gasses into the system 10.
[0042] Preferably, the system 10 further comprises an anti-static charge system 16 which preferably is arranged within the enclosure 12. The anti-static charge system 16 preferably comprises an electromagnetic discharge mat (not shown), arranged as the floor of the enclosure 12, which is electrically connected to be grounded to an earth point, such that anything electrically connected to the discharge mat 22 is held at earth potential. The anti-static charge system 16 may further comprise a number of discharge points (not shown), which are arranged at locations inside the enclosure 12, to allow the connection of machinery and/or personal.
[0043] In accordance with another preferred embodiment of the invention, the anti-static charging system 16 may further comprise discharge means (not shown). The discharge means are arranged at ingress and egress points of the enclosure 12. The discharge means being arranged to ensure, that personal entering or exiting the enclosure are returned to a ground potential.
[0044] The anti-static charging system 16 acts to ensure that there are no incidental static discharges, either within or out of the enclosure.
[0045] In accordance with a preferred embodiment of the invention, the system 10 further comprises a sublimation unit 26. Preferably, the sublimation unit 26 is arranged to be activated once sublimation of all ice and evaporation of all water inside the enclosure 12 has been converted into water vapour.
[0046] In accordance with another preferred embodiment of the invention, the system 10 further comprises a recirculation unit 28. which is arranged to re
WO 2015/085343
PCT/AU2013/001448 circulate air with a low relative humidity from the enclosure 12 back into the intake of the environmental control unit 14.
[0047] In accordance with yet another preferred embodiment of the invention, the system 10 may comprise a plurality of fans 30, arranged throughout the system to increase the rate of airflow within the system.
[0048] In use, the system 10 of the present invention acts to control the dew point in the vicinity of cryogenic piping, such that the rate of condensation forming on the piping is substantially reduced.
[0049] A plurality of panels are bought together in form an enclosure 12. The enclosure 12 is arranged around cryogenic piping which requires a controlled environment to be placed around it, such that inspection or works can be undertaken.
10050] The enclosure 12 is arranged to be in communication with an environmental control unit 14, such that the environmental control unit 14 is able to supply a constant stream of dehumidified air to the enclosure 12. The environmental control unit 14 being arranged to provide sufficient air-flow such that the interior of the enclosure 12 is at a pressure higher than atmospheric pressure.
[0051] The arrangement of the panels 20 of the enclosure 12, ensure that all seams are arranged such that once pressurised a continuous stream of air is emitted from the enclosure 12. This continuous emission of air from the seams between panels substantially prevents the ingress of outside gasses from entering the enclosure 12.
[0052] The process of dehumidifying the air normally results in a net increase of the temperature of the air above the ambient air temperature. Advantageously this results in faster sublimation of any ice or water vapour in the enclosure 12. It
WO 2015/085343
PCT/AU2013/001448 is expected that the temperature within the enclosure 12 will exceed 40 degrees Celsius in use.
[0053] Preferably, the increased internal temperature is sufficiently high enough to allow ice to sublimate directly to vapour.
[0054] The system 10 operates to control the dew point within the climate controlled enclosure 12, such that water evaporates faster than it condenses on the cryogenic piping. In effect be reducing the relative humidity of the air supplied to the climate controlled enclosure 12 and increasing the temperature inside the enclosure 12, the system 10 of the present invention causes the dew point within the enclosure 12 to lower.
[0055] Preferably, the system 10 is able to reduce the dew point within the enclosure to a temperature at which condensation forming on the cryogenic piping is substantially retarded.
[0056] More preferably, the system 10 is able to reduce the dew point to a temperature below which the cryogenic piping the enclosure surrounds is operating at, thereby effectively preventing condensation.
[0057] The enclosure 12 is arranged such that it is in electrical communication with the electro-static charge system 16. Preferably, the electro-static charge system 16 is arranged such that the anti-static discharge mat 22 forms or is on the floor of the enclosure 12.
[0058] Preferably, the anti-static discharge system 16 has arranged at locations throughout the enclosure 12 a plurality of discharge points. The discharge points being arranged to be in communication with an earth point. The plurality of discharge points being further arranged to allow the connection of earth strap, such as equipment can effectively be grounded or personal within the enclosure
WO 2015/085343
PCT/AU2013/001448 can connect individual static discharge connections between themselves and one of the discharge points.
[0059] More preferably, the anti-static discharge system 16 further comprises discharge means 24 in the form of ingress and egress curtains, which are arranged at each entry and or exit point of the enclosure 12. The ingress and egress curtains being arranged such that personal inside the enclosure will have to pass through the curtain to enter or exit the enclosure. The ingress and egress curtains therein acting to substantially prevent personal from developing a static charge while in the enclosure and then inadvertently causing a static discharge after leaving the enclosure 12.
[0060] As will be appreciated human personal, cannot work at temperatures above 40 degrees Celsius for any length of time. Therefore in accordance with a preferred embodiment of the invention the system 10 further comprises a sublimation unit 26. The sublimation unit 26 being arranged to draw air from within the enclosure 12, cool it and then pass it back into the enclosure 12. Ideally, the sublimation unit 26 should be able to sufficiently cool the air within the enclosure to around 30 degrees Celsius.
[0061] By drawing already dehumidified air from within the enclosure 12, the sublimation unit 26 is able to cool the interior of the enclosure without adversely introducing additional water vapour to the enclosure.
[0062] Preferably, the system 10 further comprises a recirculation unit 28 arranged to draw air from inside the enclosure 12 into the inlet of the environmental control unit 14. The air drawn from within the enclosure is passed back into the inlet of the environmental control unit, thereby taking low humidity air from within the enclosure and further dehumidifying it.
[0063] As will be apparent to the skilled addressee, by recirculating air from
PCT/AU2013/001448
Received 11/09/2015 within the enclosure 12 the system 10 benefits in a number of ways. Firstly, the air taken from the enclosure 12 is further dehumidified, in effect acting as a means for removing moisture from within the enclosure 12. Further, it will be apparent that by drawing already low humidity air from the enclosure, that the effective relative humidity of the airflow issuing from the environmental control unit 14 will be lower. Additionally, the energy used to reduce the humidity of air supplied to the chamber will be lower as less energy need be expended to achieve the same relative humidity.
[0064] Preferably, the recirculation unit 28 draws air from a location remote from the outlet of the sublimation unit 26 if fitted.
[0065] Even more preferably, the recirculation unit 28 is arranged to draw air from the enclosure at a location as remote as possible from the outlet of the sublimation unit 26 if fitted.
[0066] In accordance with a preferred embodiment of the present invention the system is arranged to include a plurality of independent enclosures 30, which are arranged to enclose any of the components of the system which are external to the enclosure 12, for example, the environmental control unit 14. Such an arrangement is necessary for operation of equipment in situations such as when work is being undertaken in the confines of an LNG processing facility or any other facility where flammable materials are stored or processed.
[0067] Preferably, all components of the system 10 would carry an EX rating allowing them to be used in the presence of flammable vapours, without explosion risk. Continuing the example of the environmental control unit 14 which is not EX rated, the environmental control unit 14 will be housed within the confines of a positive pressure enclosure 30.
[0068] The enclosure 30, preferably, comprises a plurality of panels 32 similar
AMENDED SHEET
WO 2015/085343
PCT/AU2013/001448 to the panels of the climate controlled enclosure 12. Each of the panels being provided with a primary and secondary fastener arranged such that a non-airtight seal is created between adjacent panels 32.
[0069] The enclosure 30 being in communication with a source of air flow such as a fan 32. The fan providing sufficient air flow to ensure that the interior of the enclosure is at a high pressure then the outside environment such that there is a positive emission of air from each of the joints between the panels of the enclosure 30 [0070] As required, other components in the system 10 may be arranged within separate enclosures 30 as required. Each of the enclosures 30 being arranged to ensure operation of EX rated equipment within hostile environments which contain flammable gasses or liquids.
[0071] Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.
Claims (19)
1. A system for reducing dew point in the vicinity of cryogenic piping comprising an enclosure arranged to enclose cryogenic piping and permitting maintenance personnel to access the cryogenic piping while in use, an environmental control unit and a plurality of gas detectors, wherein the environmental control unit is capable of pressurising the enclosure and lowering the relative humidity within the enclosure such that the dew point is reduced to a temperature at which condensation forming on the cryogenic piping is substantially retarded.
2. A system as claimed in claim 1, which comprises a recirculation unit for circulating air, drawn from within the enclosure, through the environmental control unit and returning the air to the enclosure.
3. A system as claimed in claim 2, in which the recirculation unit comprises a means for reducing the relative humidity of air circulating through the recirculation unit.
4. A system as claimed in claim 2 or 3, in which the recirculation unit comprises a means for controlling the temperature of air circulating through the recirculation means.
5. A system as claimed any one of the preceding claims, in which the environmental control unit is adapted to control temperature within the enclosure.
6. A system as claimed in claim 5, in which the environmental control unit is adapted to reduce the temperature within the enclosure.
7. A system as claimed in claim 5, in which the environmental control unit is adapted to raise the temperature within the enclosure.
8. A system as claimed in any one of the preceding claims, in which the enclosure comprises a plurality of panels.
AMENDED SHEET
PCT/AU2013/001448
Received 16/09/2015
9. A system as claimed in claim 8, in which the plurality of panels are arranged to engage with each other in a non-airtight manner.
10. A system as claimed in claim 8 or 9, which is adapted, in use, to cause a constant emission of air between the panels to substantially prevent ingress of gas into the enclosure.
11. A system as claimed in any one of the preceding claims, which comprises an electrostatic discharge system.
12. A system as claimed in claim 11, in which the electrostatic discharge system comprises a discharge mat being arranged to form or is on the floor of the enclosure.
13. A system as claimed in claim 11 or 12, in which the electrostatic discharge system comprises a plurality of discharge points arranged within the enclosure, wherein the discharge points enable connection of machinery and personal to an electrical ground.
14. A system as claimed in any one of claims 11 to 13, in which the electrostatic discharge system comprises a discharge means arranged at each ingress or egress point of the enclosure to prevent machinery and personal entering or leaving the enclosure carrying electrostatic charge.
15. A system as claimed in any one of the preceding claims, which comprises a plurality of separate pressurised enclosures.
16. A system as claimed in claim 15, in which each of the separate enclosures comprises a plurality of panels arranged to engage in a non-airtight manner.
17. A system as claimed in any one of the preceding claims, in which the environmental control unit comprises a desiccant rotor.
18. A system as claimed in any one of the preceding claims, in which the gas detectors are adapted to detect hazardous gases or vapours.
AMENDED SHEET
PCT/AU2013/001448
Received 16/09/2015
19. A system as claimed in claim 18, in which the gas detectors are associated with an alarm siren being adapted to emit a sound in the event a hazardous gas or vapour is detected.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/AU2013/001448 WO2015085343A1 (en) | 2013-12-11 | 2013-12-11 | Dew point reduction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2013407641A1 AU2013407641A1 (en) | 2016-07-28 |
| AU2013407641B2 true AU2013407641B2 (en) | 2019-05-30 |
Family
ID=53370352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2013407641A Active AU2013407641B2 (en) | 2013-12-11 | 2013-12-11 | Dew point reduction system |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2013407641B2 (en) |
| WO (1) | WO2015085343A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019138335A (en) * | 2018-02-07 | 2019-08-22 | 東京エレクトロン株式会社 | Heat-insulated piping system and processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100275620A1 (en) * | 2007-08-28 | 2010-11-04 | Air Products And Chemicals, Inc. | Apparatus and method for providing condensation- and frost-free surfaces on cryogenic components |
| CN201795280U (en) * | 2010-09-21 | 2011-04-13 | 宝山钢铁股份有限公司 | Emptying pipeline defroster for cryogenic liquid storage tanks |
| AU2012205257A1 (en) * | 2011-07-22 | 2013-02-07 | Kaefer Integrated Services Pty Ltd | An insulated ventilation enclosure system |
-
2013
- 2013-12-11 AU AU2013407641A patent/AU2013407641B2/en active Active
- 2013-12-11 WO PCT/AU2013/001448 patent/WO2015085343A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100275620A1 (en) * | 2007-08-28 | 2010-11-04 | Air Products And Chemicals, Inc. | Apparatus and method for providing condensation- and frost-free surfaces on cryogenic components |
| CN201795280U (en) * | 2010-09-21 | 2011-04-13 | 宝山钢铁股份有限公司 | Emptying pipeline defroster for cryogenic liquid storage tanks |
| AU2012205257A1 (en) * | 2011-07-22 | 2013-02-07 | Kaefer Integrated Services Pty Ltd | An insulated ventilation enclosure system |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2013407641A1 (en) | 2016-07-28 |
| WO2015085343A1 (en) | 2015-06-18 |
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| PC1 | Assignment before grant (sect. 113) |
Owner name: KMM CONTRACTING PTY LTD Free format text: FORMER APPLICANT(S): SCORE LINK PTY LTD |
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| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application | ||
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Free format text: AN APPLICATION TO EXTEND THE TIME FROM 24 JUN 2018 TO 24 NOV 2018 IN WHICH TO REQUEST EXAMINATION HAS BEEN FILED Free format text: AN APPLICATION TO EXTEND THE TIME FROM 11 DEC 2017 TO 11 OCT 2018 IN WHICH TO PAY A CONTINUATION FEE HAS BEEN FILED |
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| NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO REQUEST EXAMINATION HAS BEEN EXTENDED TO 24 NOV 2018 Free format text: THE TIME IN WHICH TO PAY A CONTINUATION FEE HAS BEEN EXTENDED TO 11 OCT 2018 |
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Owner name: ISOLOGICS PTY LTD Free format text: FORMER NAME(S): KMM CONTRACTING PTY LTD |
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Owner name: KAEFER INTEGRATED SERVICES PTY LTD Free format text: FORMER OWNER(S): ISOLOGICS PTY LTD |