GB2155854A - Rollable thermal insulation sheet - Google Patents
Rollable thermal insulation sheet Download PDFInfo
- Publication number
- GB2155854A GB2155854A GB08504626A GB8504626A GB2155854A GB 2155854 A GB2155854 A GB 2155854A GB 08504626 A GB08504626 A GB 08504626A GB 8504626 A GB8504626 A GB 8504626A GB 2155854 A GB2155854 A GB 2155854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- thermal insulation
- reinforcement
- insulation sheet
- insulating layer
- 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.)
- Granted
Links
- 238000009413 insulation Methods 0.000 title claims description 39
- 239000000945 filler Substances 0.000 claims abstract description 21
- 230000002787 reinforcement Effects 0.000 claims abstract description 21
- 239000010426 asphalt Substances 0.000 claims abstract description 15
- 229920000728 polyester Polymers 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 239000006260 foam Substances 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 239000011888 foil Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 10
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/14—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side
- B32B3/16—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side secured to a flexible backing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B11/00—Layered products comprising a layer of bituminous or tarry substances
- B32B11/10—Layered products comprising a layer of bituminous or tarry substances next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/7654—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings
- E04B1/7658—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres
- E04B1/7662—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings comprising fiber insulation, e.g. as panels or loose filled fibres comprising fiber blankets or batts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/08—Reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Building Environments (AREA)
- Road Paving Structures (AREA)
Abstract
The sheet has an insulating layer of insulating material strips 1 having one against another in a laminated manner and consisting of rigid foam or of mineral fibre mats, on the upper side of which a bituminous covering sheet 4, 5 with a carrier filler 2 of glass fibre fleece is bonded. The covering sheet projects on a longitudinal and a transverse side by at least 8 cm beyond the insulating layer. At least the longitudinal overlapping edge is provided with a reinforcement 3 of polyester fibres in a width of at least 10 cm. On the upper side the covering sheet can be bonded with a perforated plastics material foil and the free bitumen surfaces can be sprinkled with sand. <IMAGE>
Description
SPECIFICATION
Rollable thermal insulation sheet
The invention relates to a rollable thermal insulation sheet having an insulating layer of insulating material strips lying one against the other in a laminated manner and consisting of polystyrene, polyurethane, or phenolic rigid foam, or mineral fibre mats with fibres arranged substantially vertically and a bitumen covering bonded on at the top and with a carrier filler, which covering projects on a longitudinal and a transverse side by at least 8 cm beyond the insulating layer.
Rollable thermal insulation sheets of this type are used for the thermal insulation of low-pitched roofs and flat roofs. They are easy to lay and have the advantage that the thermal insulation, the pressure-compensation layer, and the first layer of the roof sealing can be fitted in one operation.
The majority of rollable thermal insulation sheets are bonded with bitumen sheets in accordance with DIN (German Industrial Standard) 52 128 with a crude felt filler. The advantage of this bonded sheet consists in the high degree of resistance to tear propagation and good bending resistance even at elevated temperatures. This means that the projecting overlapping edges do not begin to tear or tear off during manipulation on the roof and even at summer temperatures do not simply turn downwards. The disadvantage of this sheet, however, is its moisture-sensitive filler. For this reason thermal insulation sheets have also been bonded with bitumen sheets in accordance with DIN 52 143 with a glass fleece filler.The sheets are decay-resistant, but have only a slight resistance to initial tearing and tear spreading in the 8 cm wide projecting covering, and at elevated temperatures have a low bending resistance. If these sheets are laid during cool weather, the projecting overlapping edges easily break off or easily begin to tear during handling. In this event the bond no longer fulfils its purpose as the first layer of the roof covering.
According to the present invention the glass fleece filler of the bituminous covering sheet is provided at least in the region of the overlapping edge on the longitudinal side of the thermal insulation sheet in a width of at least 10 cm with a reinforcement of polyester fibres. The glass fleece filler of the bond may also, of course, be reinforced in the region of the projection edge transversely to the direction of the sheet. What is important is that the reinforcement should project beyond the edge into the region of the insulating material bond.
This overlap should preferably amount to about 2 cm at least.
The reinforcement can be formed by fabric or fleece strips of polyester fibres in the projecting edge. In terms of resistance to initial tearing and tear spreading and also in terms of bending resistance at elevated temperatures, the projecting edge of the thermal insulation sheet according to the invention surpasses that of the bond reinforced with a crude felt filler.
The invention will be described in greater detail, by way of example, with reference to the accompanying drawing, whose sole Figure illustrates in cutaway perspective view the structure of a rollable thermal insulation sheet.
The insulation sheet illustrated has an insulating layer consisting of strips 1 of insulation material lying one against another in a laminated manner, bonded with a cover sheet comprising bitumen layers 4,5 with a glass fibre fleece as an interposed reinforcement layer which itself is reinforced in the region of the longitudinal projecting edges of the cover sheet with a polyester fibre fleece strip 3 which is 10 cm wide. In this embodiment the upper bitumen layer 4 or each layer 4,5 consists of bitumen modified with plastics material. It is provided with a sprinkling 6 or bonded with a perforated plastics material foil and then sprinkled with sand, the perforation diameter preferably being 3 to 8 mm with a perforation spacing of 6 to 20 mm.
The cover sheet projects 8 cm beyond the insulating layer all round. The insulating strips 1 may be of polystyrene, polyurethane, or phenolic rigid foam. Alternatively, the strips may be replaced by mineral fibre mats with substantially vertical fibres.
in an alternative embodiment the reinforcement of polyester fibres is arranged below the glass fibre fleece in the inserted state.
1. A rollable thermal insulation sheet comprising an insulating layer of insulating material strips lying one against another in a laminated manner and consisting of polystyrene, polyurethane, or phenolic rigid foam or mineral fibre mats with fibres arranged substantially vertically, and a bituminous covering sheet bonded on the insulating layer and having overlapping edges which project on a longitudinal and a transverse side by at least 8 cm beyond the insulating layer, the covering sheet having a glass fleece filler which is provided at least in the longitudinal projecting edge over a width of at least 10 cm with a reinforcement of polyester fibres which overlaps the insulating layer.
2. An insulation sheet as claimed in claim 1, in which the glass fleece filler is provided in the transverse projecting edge over a width of at least 10 cm with a reinforcement of polyester fibres which overlaps the insulating layer.
3. An insulation sheet as claimed in claim 1 or 2, in which the reinforcement is a polyester fibre fleece strip.
4. An insulation sheet as claimed in any of claims 1 to 3, in which the reinforcement overlaps the insulating layer by at least 2 cm.
5. An insulation sheet as claimed in any of claims 1 to 4, in which the reinforcement is arranged below the glass fibre fleece.
6. An insulation sheet as claimed in any of claims 1 to 5, in which at least the bituminous material above the filler consists of bitumen modified with plastics material.
7. An insulation sheet as claimed in any of claims 1 to 6, in which the upper surface of the
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
1. A rollable thermal insulation sheet comprising an insulating layer of insulating material strips lying one against another in a laminated manner and consisting of polystyrene, polyurethane, or phenolic rigid foam or mineral fibre mats with fibres arranged substantially vertically, and a bituminous covering sheet bonded on the insulating layer and having overlapping edges which project on a longitudinal and a transverse side by at least 8 cm beyond the insulating layer, the covering sheet having a glass fleece filler which is provided at least in the longitudinal projecting edge over a width of at least 10 cm with a reinforcement of polyester fibres which overlaps the insulating layer.
2. An insulation sheet as claimed in claim 1, in which the glass fleece filler is provided in the transverse projecting edge over a width of at least 10 cm with a reinforcement of polyester fibres which overlaps the insulating layer.
3. An insulation sheet as claimed in claim 1 or 2, in which the reinforcement is a polyester fibre fleece strip.
4. An insulation sheet as claimed in any of claims 1 to 3, in which the reinforcement overlaps the insulating layer by at least 2 cm.
5. An insulation sheet as claimed in any of claims 1 to 4, in which the reinforcement is arranged below the glass fibre fleece.
6. An insulation sheet as claimed in any of claims 1 to 5, in which at least the bituminous material above the filler consists of bitumen modified with plastics material.
7. An insulation sheet as claimed in any of claims 1 to 6, in which the upper surface of the covering sheet is bonded with a perforated plastics material foil and is sprinkled with sand.
8. An insulation sheet as claimed in claim 7, in which the plastics material foil has holes 3 to 8
mm in diameter at a spacing of 6 to 20 mm.
9. A rollable thermal insulation sheet substan
tially as described with reference to the accompa
nying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19848406352U DE8406352U1 (en) | 1984-03-01 | 1984-03-01 | ROLLABLE THERMAL INSULATION |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8504626D0 GB8504626D0 (en) | 1985-03-27 |
| GB2155854A true GB2155854A (en) | 1985-10-02 |
| GB2155854B GB2155854B (en) | 1987-05-07 |
Family
ID=6764237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08504626A Expired GB2155854B (en) | 1984-03-01 | 1985-02-22 | Rollable thermal insulation sheet |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE901843A (en) |
| DE (1) | DE8406352U1 (en) |
| FR (1) | FR2560623B1 (en) |
| GB (1) | GB2155854B (en) |
| NL (1) | NL8500070A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1001711C2 (en) * | 1995-11-21 | 1997-05-23 | Esha Holding B V | Method and device for manufacturing bands of bituminized roofing material. |
| NL1001712C2 (en) * | 1995-11-21 | 1997-05-23 | Esha Holding B V | Production of supple bitumen coated roofing material |
| GB2312695A (en) * | 1997-01-20 | 1997-11-05 | Rockwool Ltd | Composite roof system |
| WO1998031895A1 (en) * | 1997-01-20 | 1998-07-23 | Rockwool Limited | Composite roof system |
| WO2000036229A1 (en) * | 1998-12-17 | 2000-06-22 | Nabento Vliesstoff Gmbh | Sealing mat and method for producing same |
| US8075971B1 (en) * | 2008-09-26 | 2011-12-13 | Norstar Office Products, Inc. | Chair mat |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8416967U1 (en) * | 1984-06-02 | 1984-10-04 | Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen | INSULATION PLATE FOR CELLAR CEILINGS AND THE LIKE AND CELLAR CEILING ITSELF |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2519484A1 (en) * | 1975-05-02 | 1976-11-18 | Ihlefeld Karl Helmut | Non-crush roof covering with non-inflammable insulating layer - without intermediate bonding layer for fibres of insulating layer |
| DE2617054A1 (en) * | 1976-04-17 | 1977-11-03 | Ruberoidwerke Ag | Roll of thermal insulation for roof sealing - with polyester fibre mat with bituminous coatings on both sides |
| FR2455659A1 (en) * | 1979-05-04 | 1980-11-28 | Siplast Soc Nouvelle | Single layer weatherproofing for building work - has high security joint giving multilayer seal |
| DE3118495A1 (en) * | 1981-05-09 | 1982-11-25 | Deutsche Rockwool Mineralwoll-GmbH, 4390 Gladbeck | Heat and/or sound insulation for building roofs, in particular flat roofs |
| DE3300755A1 (en) * | 1982-08-26 | 1984-03-01 | Rütgerswerke AG, 6000 Frankfurt | Roof waterproofing sheet with readily adhesive and skidproof surface |
-
1984
- 1984-03-01 DE DE19848406352U patent/DE8406352U1/en not_active Expired
-
1985
- 1985-01-14 NL NL8500070A patent/NL8500070A/en not_active Application Discontinuation
- 1985-02-22 GB GB08504626A patent/GB2155854B/en not_active Expired
- 1985-02-28 BE BE0/214581A patent/BE901843A/en not_active IP Right Cessation
- 1985-03-01 FR FR8503056A patent/FR2560623B1/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1001711C2 (en) * | 1995-11-21 | 1997-05-23 | Esha Holding B V | Method and device for manufacturing bands of bituminized roofing material. |
| NL1001712C2 (en) * | 1995-11-21 | 1997-05-23 | Esha Holding B V | Production of supple bitumen coated roofing material |
| EP0775775A1 (en) * | 1995-11-21 | 1997-05-28 | Esha Holding B.V. | Method and apparatus for manufacturing bands of bituminized roofing material |
| GB2312695A (en) * | 1997-01-20 | 1997-11-05 | Rockwool Ltd | Composite roof system |
| GB2312695B (en) * | 1997-01-20 | 1998-03-18 | Rockwool Ltd | Composite roof system |
| WO1998031895A1 (en) * | 1997-01-20 | 1998-07-23 | Rockwool Limited | Composite roof system |
| WO2000036229A1 (en) * | 1998-12-17 | 2000-06-22 | Nabento Vliesstoff Gmbh | Sealing mat and method for producing same |
| US8075971B1 (en) * | 2008-09-26 | 2011-12-13 | Norstar Office Products, Inc. | Chair mat |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2560623B1 (en) | 1989-07-21 |
| GB8504626D0 (en) | 1985-03-27 |
| GB2155854B (en) | 1987-05-07 |
| DE8406352U1 (en) | 1984-05-30 |
| FR2560623A1 (en) | 1985-09-06 |
| BE901843A (en) | 1985-06-17 |
| NL8500070A (en) | 1985-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930222 |