CN1069215A - A kind ofly be used for solder flux and the detonator that copper connects the thermit welding that connects line - Google Patents
A kind ofly be used for solder flux and the detonator that copper connects the thermit welding that connects line Download PDFInfo
- Publication number
- CN1069215A CN1069215A CN 91107460 CN91107460A CN1069215A CN 1069215 A CN1069215 A CN 1069215A CN 91107460 CN91107460 CN 91107460 CN 91107460 A CN91107460 A CN 91107460A CN 1069215 A CN1069215 A CN 1069215A
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- CN
- China
- Prior art keywords
- detonator
- granularity
- powder
- copper
- weight
- 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
- 239000010949 copper Substances 0.000 title claims abstract description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 29
- 229910000679 solder Inorganic materials 0.000 title claims abstract description 27
- 238000003466 welding Methods 0.000 title claims abstract description 26
- 230000004907 flux Effects 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 42
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011575 calcium Substances 0.000 claims abstract description 15
- 229960004643 cupric oxide Drugs 0.000 claims abstract description 15
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- 239000004411 aluminium Substances 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 229910004261 CaF 2 Inorganic materials 0.000 claims abstract description 4
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 239000007767 bonding agent Substances 0.000 claims abstract description 4
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims abstract description 4
- 239000005997 Calcium carbide Substances 0.000 claims abstract description 3
- 229920000742 Cotton Polymers 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims abstract description 3
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims abstract description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000020 Nitrocellulose Substances 0.000 claims description 2
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 claims description 2
- 239000002519 antifouling agent Substances 0.000 claims description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims description 2
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims description 2
- 229940112669 cuprous oxide Drugs 0.000 claims description 2
- 239000010436 fluorite Substances 0.000 claims description 2
- 229920001220 nitrocellulos Polymers 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910014458 Ca-Si Inorganic materials 0.000 description 1
- 229910004709 CaSi Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Fuses (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
Cupric oxide (CuO) powder and aluminium (Al) powder of characteristics such as that the present invention adopts is with low cost, latent heat is bigger are main, and add fine copper (Cu) powder, calcirm-fluoride (CaF
2) powder, silico-calcium (Ca
28Si
60) solder flux formed as additive of powder; With magnesium (Mg) powder, potassium bichromate (K
2Cr
2O
7) powder or potassium chlorate powder (KClO
4), fine copper (Cu) powder, silico-calcium (Ca
28Si
60) detonator that powder or red phosphorus (P) powder etc. are formed, also need add cotton glue in the detonator as bonding agent.After the copper of needs welding connected after line and rail be ready to, and lights detonator with blasting fuse or calcium carbide burning torch, the metal of solder flux was melted very soon, copper is connected line be welded on the rail.
Description
In the railway system or other enterprise, cause, in order to solve writing to each other of railway locomotive operation or writing to each other of others, the method that adopts is to utilize rail as lead at present, adopts methods such as manual electric arc welding or mechanical connection that lead is connected two one steel rail ends, dilatation joint both sides.But, in the manual electric arc welding operation in the open air, be subjected to the restriction of power supply and equipment; And the mechanical connection rule often becomes flexible because of the corrosion of environment and the vibration of train operation, causes loose contact, cannot say for sure to demonstrate,prove the operate as normal of communication line.Therefore, produced the above-mentioned arc welding and the mechanical connection method of method replacement of thermit welding in the sixties in this century.As United States Patent (USP)s in 1962 3033672 and DRP DE2333143 etc., its method is that the heat that utilizes chemical reaction to produce comes motlten metal, with this copper is connected line to be welded on the workpiece (rail), and these thermit weldings are often with cuprous oxide (Cu
2O) and the mixture of aluminium (Al) powder be main, add a spot of copper (Cu) powder, calcirm-fluoride (CaF
2) additive and suitable detonator such as powder and silico-calcium (Ca-Si) powder.
Among the present invention, the copper conductor that track circuit or other are write to each other is to adopt big and cupric oxide (CuO) powder that price is comparatively cheap of reaction release heat (granularity is 0.30～0.05mm) as main component, and is about aluminium (Al) powder of ratio adding granularity＜0.15mm of 4.3: 1 according to the ratio of cupric oxide (CuO) powder and aluminium (Al) powder with the solder flux of thermit welding; And the purity that adds granularity＜0.3mm again is that 99.8% copper (Cu) powder is made cooling agent, and its addition is 0.7～1.3 times of weight of cupric oxide (CuO) powder+aluminium (Al) powder; In addition, the still need calcirm-fluoride (CaF of adding granularity＜0.10mm
2) silico-calcium (CaSi) powder (the silico-calcium ratio is 60: 28) of powder and granularity＜0.15mm is as additive, the addition of calcium fluoride powder and silicon calcium powder be cupric oxide powder and aluminium powder weight and below 2/10.Above-mentioned solder flux, under the normal temperature situation, can not react, must there be detonator to ignite, just can make solder flux produce chemical reaction, produce the motlten metal that a large amount of heats obtain high temperature, reach and copper is connected line and rail or copper connect line and copper and connect welding between the line, therefore, detonator has important effect.Adopt metal dust type detonator, metal dust type detonator is magnesium (Mg) powder based on granularity＜0.15mm, is equipped with a certain amount of potassium bichromate (K
2Cr
2O
7) or potassium chlorate (KClO
4), and the purity of granularity＜0.15mm is that the silicon calcium powder of 99.8% copper powder and a certain amount of granularity＜0.15mm or red phosphorus powder are as additive, in order to make the metal dust in the detonator have needed shape, still needing adds a certain amount of cotton glue (i.e. 5% guncotton) as bonding agent.
The method that detonator is ignited can adopt methods such as imbedding blasting fuse or calcium carbide lighter.
In order to implement the thermit welding welding at the scene, solder flux and detonator need be packed into thermal shock resistance preferably in the container, the material of this container is advisable with cordierite, the container that solder flux and detonator are housed is put into mold by graphite system, after the detonator in the container is ignited, motlten metal is with regard to the brass sheet of melting vessel bottom, by the container bottom hole mold of flowing through, makes to be attached under the mold that the copper in hole connects line and workpiece welds together.
The pull-off force mean value that copper by thermit welding melting welding connects its solder joint of line (for Φ 0.8mm * 19 strand multicore cable) can reach the highest pull-off force of 1.54KN(and can surpass 1.7KN), and all break in the heat affected area of lead solder joint resistance value＜0.001 Ω.
In order to obtain welding effect preferably, need before the weldering to carry out processing in earlier stage such as grinder buffing at the solder side of rail; Postwelding at solder joint external coating one deck protective paint, to obtain better protect, reaches the requirement of circuit proper communication.
Embodiment:
The solder flux that thermit welding adopts consists of:
Cupric oxide (CuO) powder (weight ratio 42.3% of granularity≤0.15mm)
Aluminium (Al) powder (weight ratio 9.8% of granularity≤0.15mm)
Copper (Cu) powder (granularity≤0.15mm, purity is 99.8%) weight ratio 39.1%
Silico-calcium (Ca
28Si
60) powder (weight ratio 3.6% of granularity≤0.15mm)
Fluorite (CaF
2) powder (the weight ratio surplus of granularity≤0.08mm)
Detonator consists of:
Magnesium (Mg) powder (weight ratio 46.7% of granularity≤0.1mm)
Potassium chlorate (KClO
4) powder (weight ratio 32.4% of granularity≤0.1mm)
Copper (Cu) powder (granularity≤0.1mm; Purity is 99.8%) weight ratio 19.4%
Silico-calcium (Ca
28Si
60) powder (the weight ratio surplus of granularity≤0.1mm)
The ratio of dosage and the solder flux amount of igniting is 1: 17, be positioned in the cylindrical vessel of cordierite making, container is placed on the graphite mo(u)ld, and mold is leaned against the surface rail of having polished need weld surperficial position (rail need weld surface go up attach copper and connect line), light the blasting fuse that inserts in the container, after detonator is ignited, molten metal promptly dissolves the brass sheet on the container,, copper is connected line be welded on the rail through mold by the container bottom orifice flow, solder joint fused portion area is 100～120mm
2Through using more than half a year, the connection of solder joint is reliable, and communication line is unusual less than what cause because of quality of welding spot.
Claims (8)
1, a kind of solder flux and the detonator that copper connects the thermit welding of line, usefulness cuprous oxide (Cu of being used for
2O) be that solder flux is implemented that copper is connected line and is welded on the workpiece such as rail for the mixture of main component, thermit welding technical characterictic of the present invention is, be the solder flux of main component and be the detonator of main component with cupric oxide (CuO) powder with magnesium (Mg) powder, ignite through igniting, generate motlten metal, copper is connected line be welded on the workpiece (rail or other copper connect line).
2, the solder flux of thermit welding according to claim 1, its technical characterictic is consisting of of solder flux:
Cupric oxide (CuO) granularity 0.30～0.05mm weight ratio 34～53%
Aluminium (Al) granularity＜0.15mm percentage by weight 8～12%
Silico-calcium (Ca
28Si
60) granularity＜0.15mm percentage by weight 2.6～5%
Copper (Cu, purity 99.8%) granularity＜0.30mm percentage by weight 28～50%
Fluorite (CaF
2) granularity＜0.10mm percentage by weight 2～6%
3, the detonator of thermit welding according to claim 1 is characterized in that the detonator for the metal dust type, has two kinds, and composition is respectively:
One:
Magnesium (Mg) granularity＜0.15mm percentage by weight 15～30%
Potassium bichromate (K
2Cr
2O
7) granularity＜0.15mm percentage by weight 27～42%
Copper (Cu, purity 99.8%) granularity＜0.15mm percentage by weight 15～30%
Red phosphorus (P) granularity＜0.15mm percentage by weight 5～23%
Its two:
Magnesium (Mg) granularity＜0.15mm percentage by weight 42～56%
Potassium chlorate (KClO
4) granularity＜0.15mm percentage by weight 28～37%
Copper (Cu, purity 99.8%) granularity＜0.15mm percentage by weight 15～30%
Silico-calcium (Ca
28Si
60) granularity＜0.15mm percentage by weight 0.6～3.8%
4, according to the detonator of claim 1 and 3 described thermit weldings, it is characterized in that, is completed state as the need detonator, then need add cotton glue (5% guncotton) as bonding agent; Need to add bonding agent 14～72ml in the detonator of every 100g.
According to described thermit welding of claim 1 to 4 and detonator, it is characterized in that 5, used solder flux is (10～20) with the ratio of detonator: 1.
According to the solder flux and the detonator of the described thermit welding of claim 1 to 5, it is characterized in that 6, the igniter of lighting detonator can adopt blasting fuse or calcium carbide lighter.
7, according to the solder flux and the detonator of the described thermit welding of claim 1 to 6, it is characterized in that, copper is connected line be welded in after workpiece (rail or copper connect line) goes up, should apply protective paint on the solder joint.
According to the solder flux and the detonator of the described thermit welding of claim 1 to 7, it is characterized in that 8, processing must be given through polishing etc. in the surface of workpiece (rail or copper connect line) before the weldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107460 CN1031983C (en) | 1991-08-03 | 1991-08-03 | Welding flux and igniting agent for braze welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107460 CN1031983C (en) | 1991-08-03 | 1991-08-03 | Welding flux and igniting agent for braze welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069215A true CN1069215A (en) | 1993-02-24 |
| CN1031983C CN1031983C (en) | 1996-06-12 |
Family
ID=4908798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107460 Expired - Fee Related CN1031983C (en) | 1991-08-03 | 1991-08-03 | Welding flux and igniting agent for braze welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031983C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295055C (en) * | 2004-02-13 | 2007-01-17 | 成都桑莱特科技开发有限公司 | Hot-melt solders and their constituent exothermic molten solders |
| CN100423879C (en) * | 2005-03-25 | 2008-10-08 | 何迎春 | A kind of welding agent and its manufacturing method |
| CN100443243C (en) * | 2004-02-13 | 2008-12-17 | 余旭东 | Thermofusion solder detonator and heat-release melting solder comprising same |
| CN102267024A (en) * | 2011-07-06 | 2011-12-07 | 哈尔滨工业大学 | Solder for exothermic welding of grounding body in grounding system and ignition agent of solder |
| CN101745756B (en) * | 2009-12-18 | 2012-08-22 | 西安杰邦科技有限公司 | Molecular environment-friendly heat-release welding agent applicable to welding of copper conductor |
| CN102699521A (en) * | 2012-05-21 | 2012-10-03 | 天津大学 | Simple electroless welding pen and preparation method of electroless welding pen |
| CN103071949A (en) * | 2013-02-26 | 2013-05-01 | 武汉大学 | Self-propagating welding powder |
| CN103286476A (en) * | 2013-05-13 | 2013-09-11 | 兰州连城铝业有限责任公司 | Flux for electrified maintenance of riser bus bars of aluminum cells |
| CN109366040A (en) * | 2018-12-19 | 2019-02-22 | 成都雷斯特科技有限公司 | A kind of exothermic solder and welding method thereof |
| CN116237667A (en) * | 2023-04-17 | 2023-06-09 | 山西银河阳光科技有限公司 | Electrified repair welding agent for aluminum bus |
-
1991
- 1991-08-03 CN CN 91107460 patent/CN1031983C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443243C (en) * | 2004-02-13 | 2008-12-17 | 余旭东 | Thermofusion solder detonator and heat-release melting solder comprising same |
| CN1295055C (en) * | 2004-02-13 | 2007-01-17 | 成都桑莱特科技开发有限公司 | Hot-melt solders and their constituent exothermic molten solders |
| CN100423879C (en) * | 2005-03-25 | 2008-10-08 | 何迎春 | A kind of welding agent and its manufacturing method |
| CN101745756B (en) * | 2009-12-18 | 2012-08-22 | 西安杰邦科技有限公司 | Molecular environment-friendly heat-release welding agent applicable to welding of copper conductor |
| CN102267024B (en) * | 2011-07-06 | 2013-06-26 | 哈尔滨工业大学 | Solder for exothermic welding of grounding body in grounding system and ignition agent of solder |
| CN102267024A (en) * | 2011-07-06 | 2011-12-07 | 哈尔滨工业大学 | Solder for exothermic welding of grounding body in grounding system and ignition agent of solder |
| CN102699521A (en) * | 2012-05-21 | 2012-10-03 | 天津大学 | Simple electroless welding pen and preparation method of electroless welding pen |
| CN103071949A (en) * | 2013-02-26 | 2013-05-01 | 武汉大学 | Self-propagating welding powder |
| CN103286476A (en) * | 2013-05-13 | 2013-09-11 | 兰州连城铝业有限责任公司 | Flux for electrified maintenance of riser bus bars of aluminum cells |
| CN103286476B (en) * | 2013-05-13 | 2015-02-04 | 兰州连城铝业有限责任公司 | Flux for electrified maintenance of riser bus bars of aluminum cells |
| CN109366040A (en) * | 2018-12-19 | 2019-02-22 | 成都雷斯特科技有限公司 | A kind of exothermic solder and welding method thereof |
| CN109366040B (en) * | 2018-12-19 | 2021-02-19 | 成都雷斯特科技有限公司 | A kind of exothermic solder and welding method thereof |
| CN116237667A (en) * | 2023-04-17 | 2023-06-09 | 山西银河阳光科技有限公司 | Electrified repair welding agent for aluminum bus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031983C (en) | 1996-06-12 |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD Owner name: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAOSHAN IRON AND STEEL GENERAL PLANT |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Address before: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee before: Baosteel Group Corporation Address after: Orchard, Fujin Road, Baoshan District, Shanghai Patentee after: Baosteel Group Corporation Address before: No. 1, middle section, factory road, Shanghai, Baoshan District Patentee before: BAOSHAN IRON & STEEL |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |