ATE175680T1 - Dienpolymere mit funktionellen gruppen, ihre herstellung und ihre verwendung in für laufflächen geeignete mit kieselsäure verstärkte gummimischungen - Google Patents
Dienpolymere mit funktionellen gruppen, ihre herstellung und ihre verwendung in für laufflächen geeignete mit kieselsäure verstärkte gummimischungenInfo
- Publication number
- ATE175680T1 ATE175680T1 AT95109519T AT95109519T ATE175680T1 AT E175680 T1 ATE175680 T1 AT E175680T1 AT 95109519 T AT95109519 T AT 95109519T AT 95109519 T AT95109519 T AT 95109519T AT E175680 T1 ATE175680 T1 AT E175680T1
- Authority
- AT
- Austria
- Prior art keywords
- treading
- diene polymers
- production
- functional groups
- silicic acid
- Prior art date
Links
- 229920000642 polymer Polymers 0.000 title abstract 5
- 150000001993 dienes Chemical class 0.000 title abstract 3
- 235000012239 silicon dioxide Nutrition 0.000 title abstract 2
- LRCFXGAMWKDGLA-UHFFFAOYSA-N dioxosilane;hydrate Chemical compound O.O=[Si]=O LRCFXGAMWKDGLA-UHFFFAOYSA-N 0.000 title 1
- 239000000203 mixture Substances 0.000 title 1
- 125000003118 aryl group Chemical group 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 125000002877 alkyl aryl group Chemical group 0.000 abstract 2
- 125000000753 cycloalkyl group Chemical group 0.000 abstract 2
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 125000003710 aryl alkyl group Chemical group 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 239000003999 initiator Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 125000004430 oxygen atom Chemical group O* 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C19/00—Chemical modification of rubber
- C08C19/30—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
- C08C19/42—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups
- C08C19/44—Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with metals or metal-containing groups of polymers containing metal atoms exclusively at one or both ends of the skeleton
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Tires In General (AREA)
- Silicon Polymers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9408887A FR2722503A1 (fr) | 1994-07-15 | 1994-07-15 | Polymeres dieniques fonctionnels, leur procede de preparation et leur utilisation dans des compositions elastomeres chargees a la silice utilisables pour des enveloppes de pneumatiques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE175680T1 true ATE175680T1 (de) | 1999-01-15 |
Family
ID=9465502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT95109519T ATE175680T1 (de) | 1994-07-15 | 1995-06-20 | Dienpolymere mit funktionellen gruppen, ihre herstellung und ihre verwendung in für laufflächen geeignete mit kieselsäure verstärkte gummimischungen |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5665812A (de) |
| EP (1) | EP0692493B1 (de) |
| JP (1) | JP4067140B2 (de) |
| KR (1) | KR100352736B1 (de) |
| CN (1) | CN1062567C (de) |
| AT (1) | ATE175680T1 (de) |
| AU (1) | AU688044B2 (de) |
| CA (1) | CA2144561C (de) |
| DE (1) | DE69507213T2 (de) |
| ES (1) | ES2126810T3 (de) |
| FR (1) | FR2722503A1 (de) |
Families Citing this family (68)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5266644A (en) * | 1992-11-02 | 1993-11-30 | Eastman Kodak Company | Process for preparing epoxy-terminated polymers |
| FR2729671B1 (fr) * | 1995-01-20 | 1997-04-18 | Michelin & Cie | Enveloppe de pneumatique a base de silice precipitee presentant une resistance au roulement amelioree |
| JPH0987426A (ja) * | 1995-09-20 | 1997-03-31 | Bridgestone Corp | ゴム組成物の製造方法 |
| DE69622235T2 (de) * | 1995-10-04 | 2003-01-23 | Compagnie Generale Des Etablissements Michelin-Michelin & Cie., Clermont-Ferrand | Kautschukmischung basierend auf einem Dienpolymer mit von Organosilanen abgeleiteten Gruppen zur Verwendung in Reifenlaufflächen |
| FR2765882B1 (fr) * | 1997-07-11 | 1999-09-03 | Michelin & Cie | Composition de caoutchouc a base de noir de carbone ayant de la silice fixee a sa surface et de polymere dienique fonctionnalise alcoxysilane |
| US6344538B1 (en) | 1998-08-24 | 2002-02-05 | Iowa State University Research Foundation, Inc. | Functionalized diene monomers and polymers containing functionalized dienes and methods for their preparation |
| US6100373A (en) * | 1998-08-24 | 2000-08-08 | Iowa State University Research Foundation, Inc. | Functionalized diene monomers and polymers containing functionalized dienes and methods for their preparation |
| EP1018521A1 (de) | 1999-01-06 | 2000-07-12 | Société de Technologie Michelin | Verfahren zur Herstellung von Dienpolymeren mit Amino-Gruppen, diese Polymere, Kautschukzusammensetzungen und Reifenlaufflächen daraus |
| ES2225157T3 (es) * | 1999-05-31 | 2005-03-16 | Pirelli Pneumatici Societa Per Azioni | Neumatico de baja resistencia al rodamiento para automoviles. |
| CA2312880A1 (en) * | 1999-08-25 | 2001-02-25 | The Goodyear Tire & Rubber Company | Rubber composition containing two silicas |
| US6482884B1 (en) | 2000-02-28 | 2002-11-19 | Pirelli Pneumatici S.P.A. | Silica reinforced rubber compositions of improved processability and storage stability |
| CN101307162B (zh) | 2000-05-22 | 2014-03-19 | 米其林集团总公司 | 轮胎行驶胎面的组合物以及它的制造方法 |
| CN1140570C (zh) | 2000-05-26 | 2004-03-03 | 米其林技术公司 | 可用作轮胎胎面的橡胶组合物 |
| EP2289710B1 (de) * | 2000-07-03 | 2018-11-07 | Bridgestone Corporation | Luftreifen |
| ATE410451T1 (de) | 2001-02-15 | 2008-10-15 | Japan Elastomer Co Ltd | Modifizierter kautschuk, verfahren zu dessen herstellung und zusammensetzung |
| ATE465208T1 (de) * | 2001-06-28 | 2010-05-15 | Michelin Soc Tech | Reifenlauffläche verstärkt durch kieselsäure mit niedriger spezifischer oberfläche |
| JP4536375B2 (ja) * | 2001-06-28 | 2010-09-01 | ソシエテ ド テクノロジー ミシュラン | 極めて低い比表面積のシリカで強化されたタイヤトレッド |
| AU2002356721A1 (en) | 2001-11-26 | 2003-06-10 | Societe De Technologie Michelin | Rubber composition for running tread and method for obtaining same |
| CN1649907B (zh) * | 2002-04-10 | 2010-10-13 | 旭化成化学株式会社 | 改性聚合物及包含所述改性聚合物的组合物 |
| JP5016924B2 (ja) | 2003-06-09 | 2012-09-05 | 株式会社ブリヂストン | 逐次的に停止させたポリマーを含む改良されたヒステリシスを有するエラストマー組成物 |
| WO2007024797A2 (en) * | 2005-08-22 | 2007-03-01 | Bridgestone Corporation | Functionalized polymers and improved tires therefrom |
| WO2008032417A1 (fr) * | 2006-09-15 | 2008-03-20 | Sumitomo Chemical Company, Limited | Polymère de diène conjugué, procédé de fabrication d'un polymère de diène conjugué, composition de polymère de diène conjugué et procédé de fabrication d'une composition de polymère de diène conjugué |
| US8633281B2 (en) * | 2006-09-15 | 2014-01-21 | Sumitomo Chemical Company, Limited | Conjugated diene polymer, process for producing conjugated diene polymer, conjugated diene polymer composition and process for producing conjugated diene polymer composition |
| CN101724185B (zh) * | 2008-10-16 | 2013-10-23 | 住友橡胶工业株式会社 | 橡胶组合物及轮胎 |
| US20100152364A1 (en) * | 2008-12-12 | 2010-06-17 | The Goodyear Tire & Rubber Company | Polymers, rubber compositions, and tires |
| FR2940294B1 (fr) | 2008-12-23 | 2011-02-18 | Michelin Soc Tech | Nouveau systeme d'amorcage pour polymerisation anionique de dienes conjugues, procede de preparation d'elastomeres dieniques. |
| FR2946047B1 (fr) | 2009-06-02 | 2011-07-29 | Michelin Soc Tech | Nouveaux composes organometallique a base d'un metal appartenant a la 2eme colonne de la classification periodique et procede de preparation |
| FR2946048B1 (fr) | 2009-06-02 | 2012-12-28 | Michelin Soc Tech | Systeme catalytique pour la polymerisation de dienes conjugues,procede de polymerisation et polymere fonctionnel obtenu |
| FR2951178B1 (fr) | 2009-10-08 | 2012-08-17 | Michelin Soc Tech | Elastomere dienique fonctionnalise et composition de caoutchouc le contenant. |
| FR2951186B1 (fr) * | 2009-10-12 | 2012-01-06 | Michelin Soc Tech | Composition de caoutchouc a base de glycerol et d'un elastomere fonctionnalise et bande de roulement pour pneumatique |
| FR2954774B1 (fr) | 2009-10-30 | 2012-01-06 | Michelin Soc Tech | Methode de preparation d'un melange maitre de caoutchouc naturel et de silice |
| FR2954775B1 (fr) | 2009-10-30 | 2012-03-30 | Michelin Soc Tech | Methode de preparation d'un melange maitre d'elastomere dienique synthetique et de silice |
| FR2952064B1 (fr) | 2009-10-30 | 2012-08-31 | Michelin Soc Tech | Methode de preparation d'un melange maitre d'elastomere dienique et de silice |
| TW201211083A (en) | 2010-06-15 | 2012-03-16 | Styron Europe Gmbh | Low vinyl styrene-butadiene polymers and methods of making the same |
| ES2530075T3 (es) * | 2010-12-30 | 2015-02-26 | Bridgestone Corporation | Iniciadores de aminosilano y polímeros funcionalizados preparados a partir de los mismos |
| EP2495266A1 (de) | 2011-03-04 | 2012-09-05 | Styron Deutschland GmbH | Styrol-Butadien Kautschuk mit hohem Styrol- sowie hohem Vinyl-Gehalt und Herstellungsverfahren dafür |
| ES2598035T3 (es) | 2011-03-04 | 2017-01-24 | Trinseo Europe Gmbh | Caucho de estireno-butadieno de alto contenido de estireno y alto contenido de vinilo y métodos para la preparación del mismo |
| FR2974093B1 (fr) | 2011-04-15 | 2015-05-08 | Michelin Soc Tech | Procede de preparation d'un melange maitre d'elastomere et d'une charge inorganique renforcante |
| HUE040405T2 (hu) | 2011-06-22 | 2019-03-28 | Trinseo Europe Gmbh | Nagy sztirol- és nagy viniltartalmú sztirol-butadién gumi, szûk molekultömeg-eloszlással, valamint ezek elõállítási módszerei |
| ES2545332T3 (es) | 2011-06-22 | 2015-09-10 | Trinseo Europe Gmbh | Caucho de estireno-butadieno de alto contenido en estireno, alto contenido en vinilo, con distribución de pesos moleculares estrecha y métodos para la preparación de los mismos |
| TWI466898B (zh) | 2011-08-31 | 2015-01-01 | Tsrc Corp | 共軛二烯橡膠的製造方法及其組成物 |
| FR2981077B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode pour preparer un melange maitre d'elastomere dienique et de silice |
| FR2981081B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode de preparation d'un melange maitre de caoutchouc naturel et de silice |
| FR2981076B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode pour preparer un melange maitre d'elastomere dienique et de silice |
| FR2981080B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode de preparation d'un melange maitre de caoutchouc naturel et de silice dopee magnesium |
| FR2981079B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode pour preparer un melange maitre d'elastomere dienique et de silice |
| FR2981078B1 (fr) | 2011-10-11 | 2013-11-01 | Michelin Soc Tech | Methode pour preparer un melange maitre d'elastomere dienique et de silice |
| WO2013096788A1 (en) * | 2011-12-21 | 2013-06-27 | Ikaria Development Subsidiary One Llc | Process for manufacturing partially cross-linked alginate solution |
| FR2999589B1 (fr) * | 2012-12-17 | 2014-12-26 | Michelin & Cie | Pneumatique comportant une composition de caoutchouc comprenant un elastomere epoxyde reticule par un poly-acide carboxylique |
| FR3012454B1 (fr) | 2013-10-30 | 2015-12-18 | Michelin & Cie | Elastomere dienique modifie comprenant majoritairement un elastomere dienique couple par un compose alcoxysilane portant un groupe epoxyde et fonctionnalise amine en extremite de chaine |
| CN105814143A (zh) * | 2013-12-09 | 2016-07-27 | 盛禧奥欧洲有限责任公司 | 硅烷改性的弹性聚合物 |
| FR3022548A1 (fr) | 2014-06-18 | 2015-12-25 | Michelin & Cie | Composition de caoutchouc comprenant un elastomere epoxyde reticule par un poly-acide carboxylique |
| FR3038313B1 (fr) * | 2015-07-02 | 2017-07-21 | Michelin & Cie | Elastomere dienique modifie a ip reduit et composition de caoutchouc le contenant |
| FR3038320A1 (fr) | 2015-07-02 | 2017-01-06 | Michelin & Cie | Composition de caoutchouc comprenant une silice de tres haute surface specifique et une resine hydrocarbonee de faible temperature de transition vitreuse |
| FR3042193A1 (fr) | 2015-10-08 | 2017-04-14 | Michelin & Cie | Elastomere dienique possedant une fonction en milieu de chaine et composition de caoutchouc le contenant |
| CN107814878B (zh) * | 2016-09-13 | 2020-02-14 | 中国石油天然气股份有限公司 | 一种双官能化丁苯聚合物及其制备方法 |
| CN108084345A (zh) * | 2016-11-23 | 2018-05-29 | 中国石油天然气股份有限公司 | 双官能化丁苯聚合物、橡胶组合物及硫化橡胶 |
| FR3065960B1 (fr) | 2017-05-05 | 2019-06-28 | Compagnie Generale Des Etablissements Michelin | Composition de caoutchouc comprenant au moins une silice en tant que charge renforcante inorganique |
| FR3079841B1 (fr) | 2018-04-06 | 2020-10-09 | Michelin & Cie | Pneumatique comportant une composition de caoutchouc comprenant un nouvel agent de couplage polysulfure porteur de groupes associatifs azotes |
| FR3079842B1 (fr) | 2018-04-06 | 2020-10-09 | Michelin & Cie | Pneumatique comportant une composition de caoutchouc comprenant un nouvel agent de couplage polysulfure porteur de groupes associatifs azotes |
| FR3082781B1 (fr) | 2018-06-21 | 2022-12-02 | Michelin & Cie | Pneumatique comprenant un composite piezoelectrique |
| FR3083005B1 (fr) | 2018-06-21 | 2020-11-20 | Michelin & Cie | Dispositif en matrice elastomere comprenant des charges piezoelectriques et des electrodes |
| JP7772594B2 (ja) | 2019-05-07 | 2025-11-18 | ブリヂストン アメリカズ タイヤ オペレーションズ、 エルエルシー | 変性高シスポリブタジエンポリマー、関連方法及びゴム組成物 |
| JP7261670B2 (ja) * | 2019-06-20 | 2023-04-20 | 株式会社ブリヂストン | タイヤ |
| CN113260638B (zh) | 2019-10-30 | 2024-03-19 | 株式会社Lg化学 | 改性共轭二烯类聚合物和包含该改性共轭二烯类聚合物的橡胶组合物 |
| CN111825819A (zh) * | 2020-06-11 | 2020-10-27 | 云南大学 | 一种基于动态聚合物基质的新型磁流变弹性体及制备方法 |
| FR3113905B1 (fr) | 2020-09-04 | 2022-08-05 | Michelin & Cie | Composition de caoutchouc a base d’elastomere dienique fortement sature |
| FR3113906B1 (fr) | 2020-09-04 | 2022-08-05 | Michelin & Cie | Composition de caoutchouc a base d’elastomere dienique fortement sature |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135716A (en) * | 1958-11-06 | 1964-06-02 | Phillips Petroleum Co | Process for preparing terminally reactive polymers |
| US3244664A (en) | 1960-10-24 | 1966-04-05 | Phillips Petroleum Co | Silicon-containing polymers |
| US3244644A (en) * | 1962-02-13 | 1966-04-05 | Du Pont | Method of preparing a catalyst composition consisting of ruthenium on etaalumina and the product thereof |
| US3281383A (en) * | 1962-08-09 | 1966-10-25 | Phillips Petroleum Co | Branched polymers prepared from monolithium-terminated polymers and compounds having at least three reactive sites |
| FR2053786A5 (de) * | 1969-07-17 | 1971-04-16 | Michelin & Cie | |
| FR2340958A2 (fr) | 1974-06-05 | 1977-09-09 | Michelin & Cie | Procede de polymerisation ou de copolymerisation de dienes conjugues et polymeres ainsi obtenus |
| FR2273822A1 (fr) | 1974-06-05 | 1976-01-02 | Michelin & Cie | Polymeres ou copolymeres a composition sterique modifiee, obtenus par mise en oeuvre d'une nouvelle composition catalytique |
| FR2302311A1 (fr) | 1975-02-27 | 1976-09-24 | Michelin & Cie | Procede de preparation de polymeres de dienes |
| FR2338953A2 (fr) | 1976-01-21 | 1977-08-19 | Michelin & Cie | Procede de preparation de polymeres de dienes conjugues ou de copolymeres de dienes conjugues soit entre eux, soit avec un compose vinylaromatique |
| GB1597500A (en) * | 1977-12-29 | 1981-09-09 | Shell Int Research | Polymers |
| JPS56104906A (en) | 1980-01-25 | 1981-08-21 | Asahi Chem Ind Co Ltd | Polymer having reactive end group |
| FR2562534B1 (fr) | 1984-04-06 | 1986-06-27 | Rhone Poulenc Chim Base | Nouvelle silice precipitee a caracteres morphologiques ameliores, procede pour son obtention et application, notamment comme charge |
| JPH0713158B2 (ja) * | 1987-01-14 | 1995-02-15 | 株式会社ブリヂストン | タイヤ |
| EP0447066B2 (de) | 1990-03-02 | 2000-08-16 | Bridgestone Corporation | Luftreifen |
| FR2673187B1 (fr) | 1991-02-25 | 1994-07-01 | Michelin & Cie | Composition de caoutchouc et enveloppes de pneumatiques a base de ladite composition. |
| FR2678259B1 (fr) | 1991-06-26 | 1993-11-05 | Rhone Poulenc Chimie | Nouvelles silices precipitees sous forme de granules ou de poudres, procedes de synthese et utilisation au renforcement des elastomeres. |
-
1994
- 1994-07-15 FR FR9408887A patent/FR2722503A1/fr active Pending
-
1995
- 1995-03-14 CA CA002144561A patent/CA2144561C/fr not_active Expired - Fee Related
- 1995-04-03 US US08/415,523 patent/US5665812A/en not_active Expired - Lifetime
- 1995-06-20 AT AT95109519T patent/ATE175680T1/de not_active IP Right Cessation
- 1995-06-20 DE DE69507213T patent/DE69507213T2/de not_active Expired - Lifetime
- 1995-06-20 ES ES95109519T patent/ES2126810T3/es not_active Expired - Lifetime
- 1995-06-20 EP EP95109519A patent/EP0692493B1/de not_active Expired - Lifetime
- 1995-07-13 AU AU24976/95A patent/AU688044B2/en not_active Ceased
- 1995-07-14 KR KR1019950020689A patent/KR100352736B1/ko not_active Expired - Fee Related
- 1995-07-14 CN CN95108907A patent/CN1062567C/zh not_active Expired - Fee Related
- 1995-07-14 JP JP17853995A patent/JP4067140B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1062567C (zh) | 2001-02-28 |
| AU688044B2 (en) | 1998-03-05 |
| CA2144561C (fr) | 2007-08-21 |
| US5665812A (en) | 1997-09-09 |
| FR2722503A1 (fr) | 1996-01-19 |
| KR960004420A (ko) | 1996-02-23 |
| CA2144561A1 (fr) | 1996-01-16 |
| ES2126810T3 (es) | 1999-04-01 |
| AU2497695A (en) | 1996-01-25 |
| EP0692493B1 (de) | 1999-01-13 |
| JPH0853513A (ja) | 1996-02-27 |
| DE69507213D1 (de) | 1999-02-25 |
| KR100352736B1 (ko) | 2002-12-28 |
| JP4067140B2 (ja) | 2008-03-26 |
| CN1121081A (zh) | 1996-04-24 |
| DE69507213T2 (de) | 1999-06-10 |
| EP0692493A1 (de) | 1996-01-17 |
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| REN | Ceased due to non-payment of the annual fee |