NL8900954A - Droge transformator met omhulde wikkelingen, vergelijkbare elektrische geleiders of installaties en werkwijze voor bereiden van de omhullingshars. - Google Patents
Droge transformator met omhulde wikkelingen, vergelijkbare elektrische geleiders of installaties en werkwijze voor bereiden van de omhullingshars. Download PDFInfo
- Publication number
- NL8900954A NL8900954A NL8900954A NL8900954A NL8900954A NL 8900954 A NL8900954 A NL 8900954A NL 8900954 A NL8900954 A NL 8900954A NL 8900954 A NL8900954 A NL 8900954A NL 8900954 A NL8900954 A NL 8900954A
- Authority
- NL
- Netherlands
- Prior art keywords
- water
- resin
- incombustible
- substance
- temperature
- Prior art date
Links
- 229920005989 resin Polymers 0.000 title claims description 68
- 239000011347 resin Substances 0.000 title claims description 68
- 238000000034 method Methods 0.000 title claims description 11
- 239000004020 conductor Substances 0.000 title claims description 10
- 239000011248 coating agent Substances 0.000 title claims description 7
- 238000000576 coating method Methods 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 239000000126 substance Substances 0.000 claims description 35
- 230000004580 weight loss Effects 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 22
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- UOCIZHQMWNPGEN-UHFFFAOYSA-N dialuminum;oxygen(2-);trihydrate Chemical compound O.O.O.[O-2].[O-2].[O-2].[Al+3].[Al+3] UOCIZHQMWNPGEN-UHFFFAOYSA-N 0.000 claims description 4
- 238000010616 electrical installation Methods 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 claims description 4
- 150000004684 trihydrates Chemical class 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 3
- 230000002028 premature Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 208000016261 weight loss Diseases 0.000 claims 7
- 208000005156 Dehydration Diseases 0.000 claims 3
- 230000001627 detrimental effect Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 45
- 229910052681 coesite Inorganic materials 0.000 description 22
- 229910052906 cristobalite Inorganic materials 0.000 description 22
- 229910052682 stishovite Inorganic materials 0.000 description 22
- 229910052905 tridymite Inorganic materials 0.000 description 22
- 229910052782 aluminium Inorganic materials 0.000 description 21
- 239000000377 silicon dioxide Substances 0.000 description 18
- 235000012239 silicon dioxide Nutrition 0.000 description 17
- 238000005755 formation reaction Methods 0.000 description 13
- 229910004298 SiO 2 Inorganic materials 0.000 description 11
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000001033 granulometry Methods 0.000 description 3
- 238000000892 gravimetry Methods 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229920003319 Araldite® Polymers 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- RREGISFBPQOLTM-UHFFFAOYSA-N alumane;trihydrate Chemical compound O.O.O.[AlH3] RREGISFBPQOLTM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000008064 anhydrides Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- LCFVJGUPQDGYKZ-UHFFFAOYSA-N Bisphenol A diglycidyl ether Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCC1CO1 LCFVJGUPQDGYKZ-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 238000007707 calorimetry Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000006194 liquid suspension Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- DXFMNLVBRPNOLH-UHFFFAOYSA-N magnesium;oxygen(2-);dihydrate Chemical compound O.O.[O-2].[Mg+2] DXFMNLVBRPNOLH-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002924 oxiranes Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
- Organic Insulating Materials (AREA)
- Insulating Of Coils (AREA)
- Paints Or Removers (AREA)
- Coils Of Transformers For General Uses (AREA)
- Housings And Mounting Of Transformers (AREA)
- Epoxy Resins (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8805641 | 1988-04-22 | ||
| FR8805641A FR2630578B1 (fr) | 1988-04-22 | 1988-04-22 | Transformateur sec enrobe a comportement au feu ameliore et procede de preparation de sa resine d'enrobage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8900954A true NL8900954A (nl) | 1989-11-16 |
Family
ID=9365755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8900954A NL8900954A (nl) | 1988-04-22 | 1989-04-17 | Droge transformator met omhulde wikkelingen, vergelijkbare elektrische geleiders of installaties en werkwijze voor bereiden van de omhullingshars. |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JP2722405B2 (de) |
| AT (1) | AT402242B (de) |
| BE (1) | BE1006158A4 (de) |
| CA (1) | CA1325072C (de) |
| CH (1) | CH678988A5 (de) |
| DE (1) | DE3912874C2 (de) |
| DK (1) | DK192089A (de) |
| ES (1) | ES2010928A6 (de) |
| FR (1) | FR2630578B1 (de) |
| GB (1) | GB2217719B (de) |
| IE (1) | IE64367B1 (de) |
| IT (1) | IT1234438B (de) |
| LU (1) | LU87494A1 (de) |
| NL (1) | NL8900954A (de) |
| PT (1) | PT90346B (de) |
| SE (1) | SE508250C2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2630578B1 (fr) * | 1988-04-22 | 1990-07-27 | France Transfo Sa | Transformateur sec enrobe a comportement au feu ameliore et procede de preparation de sa resine d'enrobage |
| DE50014006D1 (de) | 1999-03-16 | 2007-03-15 | Huntsman Adv Mat Switzerland | Härtbare zusammensetzung mit besonderer eigenschaftskombination |
| JP6567797B1 (ja) * | 2018-09-03 | 2019-08-28 | 住友精化株式会社 | 導体と絶縁被膜の積層体、コイル、回転電機、絶縁塗料、及び絶縁フィルム |
| CN112640011B (zh) * | 2018-09-03 | 2024-09-10 | 住友精化株式会社 | 导体与绝缘被膜的层叠体、线圈、旋转电机、绝缘涂料和绝缘膜 |
| CN111623884B (zh) * | 2020-05-28 | 2021-05-18 | 山东大学 | 基于改进热网络模型的变压器热点温度识别方法及系统 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3202947A (en) * | 1961-02-16 | 1965-08-24 | Jefferson Electric Co | Epoxy insulated transformer having tris-beta-chloroethylphosphate and hydrated alumina in the insulation |
| US3626083A (en) * | 1968-01-12 | 1971-12-07 | Westinghouse Electric Corp | High-voltage insulation and insulated high-voltage apparatus |
| US3733283A (en) * | 1971-05-10 | 1973-05-15 | Du Pont | Flameproof polylactam composition and process for its manufacture |
| US4059560A (en) * | 1976-05-05 | 1977-11-22 | The Firestone Tire & Rubber Company | Smoke and flame retarded styrene polymers |
| US4193908A (en) * | 1978-09-20 | 1980-03-18 | Aluminum Company Of America | Method of reducing the viscosity of polyester-alumina _trihydrate dispersions by slight dehydration of trihydrate |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1072285B (de) * | 1959-12-31 | |||
| US2945912A (en) * | 1953-06-15 | 1960-07-19 | Moser Glaser & Co Ag | High voltage insulator |
| DE1121670B (de) * | 1955-07-21 | 1962-01-11 | Gen Electric | Kriechstromfestes Isoliermaterial fuer elektrische Geraete |
| US2990497A (en) * | 1959-06-04 | 1961-06-27 | Deluxe Coils Inc | Power pack encapsulation |
| GB1576879A (en) * | 1976-09-20 | 1980-10-15 | Hitachi Ltd | Flame-retardant epoxy resin compositions |
| JPS5442603A (en) * | 1977-09-09 | 1979-04-04 | Hitachi Ltd | Plastic resin moulded electric motor |
| US4361620A (en) * | 1979-03-08 | 1982-11-30 | Wing Industries, Inc. | Total energy exchange medium and method of making the same |
| JPS5685806A (en) * | 1979-12-14 | 1981-07-13 | Hitachi Ltd | Stabilizer for resin molded fluorescent lamp |
| US4454280A (en) * | 1981-03-31 | 1984-06-12 | The Firestone Tire & Rubber Company | Polymers having reduced carbon monoxide generation upon burning |
| US4361668A (en) * | 1981-03-31 | 1982-11-30 | The Firestone Tire & Rubber Company | Polmers having reduced carbon monoxide generation upon burning |
| JPS6047410A (ja) * | 1983-08-26 | 1985-03-14 | Hitachi Ltd | フライバックトランスの製造法 |
| JPS6131416A (ja) * | 1984-07-25 | 1986-02-13 | Hitachi Ltd | 熱硬化性レジン組成物 |
| US4668718A (en) * | 1984-10-05 | 1987-05-26 | Ciba-Geigy Corporation | Self-extinguishing, track-resistant epoxy resin moulding composition and use thereof |
| JPS61113641A (ja) * | 1984-11-09 | 1986-05-31 | Sumitomo Bakelite Co Ltd | 耐電食性用フエノ−ル樹脂組成物 |
| GB8610067D0 (en) * | 1986-04-24 | 1986-05-29 | Steetley Refractories Ltd | Coated magnesium hydroxide |
| JPS62290718A (ja) * | 1986-06-11 | 1987-12-17 | Hitachi Ltd | エポキシ樹脂組成物とこれらを用いてフライバツクトランスを製造する方法 |
| US4772654A (en) * | 1987-07-21 | 1988-09-20 | E. I. Du Pont De Nemours And Company | Fire resistant polymers containing magnesium oxychloride |
| FR2630578B1 (fr) * | 1988-04-22 | 1990-07-27 | France Transfo Sa | Transformateur sec enrobe a comportement au feu ameliore et procede de preparation de sa resine d'enrobage |
-
1988
- 1988-04-22 FR FR8805641A patent/FR2630578B1/fr not_active Expired - Lifetime
-
1989
- 1989-04-03 SE SE8901148A patent/SE508250C2/sv not_active IP Right Cessation
- 1989-04-04 CH CH1231/89A patent/CH678988A5/fr not_active IP Right Cessation
- 1989-04-06 LU LU87494A patent/LU87494A1/fr unknown
- 1989-04-14 ES ES8901315A patent/ES2010928A6/es not_active Expired
- 1989-04-14 IT IT8909403A patent/IT1234438B/it active
- 1989-04-14 BE BE8900417A patent/BE1006158A4/fr not_active IP Right Cessation
- 1989-04-17 NL NL8900954A patent/NL8900954A/nl not_active Application Discontinuation
- 1989-04-18 IE IE122989A patent/IE64367B1/en not_active IP Right Cessation
- 1989-04-18 CA CA000597015A patent/CA1325072C/fr not_active Expired - Fee Related
- 1989-04-19 DE DE3912874A patent/DE3912874C2/de not_active Expired - Fee Related
- 1989-04-20 GB GB8909009A patent/GB2217719B/en not_active Expired - Lifetime
- 1989-04-20 DK DK192089A patent/DK192089A/da unknown
- 1989-04-20 AT AT0094689A patent/AT402242B/de not_active IP Right Cessation
- 1989-04-21 PT PT90346A patent/PT90346B/pt not_active IP Right Cessation
- 1989-04-24 JP JP1104363A patent/JP2722405B2/ja not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3202947A (en) * | 1961-02-16 | 1965-08-24 | Jefferson Electric Co | Epoxy insulated transformer having tris-beta-chloroethylphosphate and hydrated alumina in the insulation |
| US3626083A (en) * | 1968-01-12 | 1971-12-07 | Westinghouse Electric Corp | High-voltage insulation and insulated high-voltage apparatus |
| US3733283A (en) * | 1971-05-10 | 1973-05-15 | Du Pont | Flameproof polylactam composition and process for its manufacture |
| US4059560A (en) * | 1976-05-05 | 1977-11-22 | The Firestone Tire & Rubber Company | Smoke and flame retarded styrene polymers |
| US4193908A (en) * | 1978-09-20 | 1980-03-18 | Aluminum Company Of America | Method of reducing the viscosity of polyester-alumina _trihydrate dispersions by slight dehydration of trihydrate |
Also Published As
| Publication number | Publication date |
|---|---|
| DK192089D0 (da) | 1989-04-20 |
| ES2010928A6 (es) | 1989-12-01 |
| SE508250C2 (sv) | 1998-09-21 |
| JPH0212904A (ja) | 1990-01-17 |
| GB8909009D0 (en) | 1989-06-07 |
| SE8901148L (sv) | 1989-10-23 |
| IT8909403A0 (it) | 1989-04-14 |
| IT1234438B (it) | 1992-05-18 |
| DK192089A (da) | 1989-10-23 |
| DE3912874C2 (de) | 1996-12-12 |
| PT90346B (pt) | 1994-04-29 |
| IE64367B1 (en) | 1995-07-26 |
| ATA94689A (de) | 1996-07-15 |
| CA1325072C (fr) | 1993-12-07 |
| FR2630578A1 (fr) | 1989-10-27 |
| GB2217719A (en) | 1989-11-01 |
| SE8901148D0 (sv) | 1989-04-03 |
| GB2217719B (en) | 1991-12-11 |
| LU87494A1 (fr) | 1989-09-12 |
| PT90346A (pt) | 1989-11-10 |
| FR2630578B1 (fr) | 1990-07-27 |
| CH678988A5 (de) | 1991-11-29 |
| BE1006158A4 (fr) | 1994-05-31 |
| JP2722405B2 (ja) | 1998-03-04 |
| AT402242B (de) | 1997-03-25 |
| IE891229L (en) | 1989-10-22 |
| DE3912874A1 (de) | 1989-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA | A request for search or an international-type search has been filed | ||
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BV | The patent application has lapsed |