DE69111359D1 - Vernetzbare Zellulosederivate. - Google Patents
Vernetzbare Zellulosederivate.Info
- Publication number
- DE69111359D1 DE69111359D1 DE69111359T DE69111359T DE69111359D1 DE 69111359 D1 DE69111359 D1 DE 69111359D1 DE 69111359 T DE69111359 T DE 69111359T DE 69111359 T DE69111359 T DE 69111359T DE 69111359 D1 DE69111359 D1 DE 69111359D1
- Authority
- DE
- Germany
- Prior art keywords
- cellulose derivatives
- crosslinkable cellulose
- crosslinkable
- derivatives
- cellulose
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5756—Macromolecular compounds containing cross-linking agents
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/926—Packer fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Graft Or Block Polymers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/592,770 US5067565A (en) | 1989-03-10 | 1990-10-04 | Crosslinkable cellulose derivatives |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69111359D1 true DE69111359D1 (de) | 1995-08-24 |
DE69111359T2 DE69111359T2 (de) | 1996-01-04 |
Family
ID=24371999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69111359T Expired - Fee Related DE69111359T2 (de) | 1990-10-04 | 1991-10-04 | Vernetzbare Zellulosederivate. |
Country Status (3)
Country | Link |
---|---|
US (1) | US5067565A (de) |
EP (1) | EP0479606B1 (de) |
DE (1) | DE69111359T2 (de) |
Families Citing this family (77)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5363916A (en) * | 1992-12-21 | 1994-11-15 | Halliburton Company | Method of gravel packing a well |
US5304620A (en) * | 1992-12-21 | 1994-04-19 | Halliburton Company | Method of crosslinking cellulose and guar derivatives for treating subterranean formations |
US5346339A (en) * | 1993-06-16 | 1994-09-13 | Halliburton Company | Pipeline cleaning process |
US5413178A (en) * | 1994-04-12 | 1995-05-09 | Halliburton Company | Method for breaking stabilized viscosified fluids |
US5439057A (en) * | 1994-04-29 | 1995-08-08 | Halliburton Company | Method for controlling fluid loss in high permeability formations |
US5669447A (en) * | 1996-04-01 | 1997-09-23 | Halliburton Energy Services, Inc. | Methods for breaking viscosified fluids |
US5669446A (en) * | 1996-04-01 | 1997-09-23 | Halliburton Energy Services, Inc. | Methods for breaking viscosified fluids |
US5701956A (en) * | 1996-04-17 | 1997-12-30 | Halliburton Energy Services, Inc. | Methods and compositions for reducing water production from subterranean formations |
US5680900A (en) * | 1996-07-23 | 1997-10-28 | Halliburton Energy Services Inc. | Method for enhancing fluid loss control in subterranean formation |
US5762140A (en) * | 1996-11-04 | 1998-06-09 | Halliburton Energy Services, Inc. | High viscosity low friction pressure loss well treating fluids and methods |
US6667279B1 (en) | 1996-11-13 | 2003-12-23 | Wallace, Inc. | Method and composition for forming water impermeable barrier |
US5950731A (en) * | 1997-11-05 | 1999-09-14 | Halliburton Energy Services, Inc. | Methods and compositions for breaking viscosified fluids |
US5996694A (en) * | 1997-11-20 | 1999-12-07 | Halliburton Energy Service, Inc. | Methods and compositions for preventing high density well completion fluid loss |
US6213213B1 (en) | 1999-10-08 | 2001-04-10 | Halliburton Energy Services, Inc. | Methods and viscosified compositions for treating wells |
US6514610B2 (en) * | 1999-12-13 | 2003-02-04 | Fuji Spinning Co., Ltd. | Method for manufacturing improved regenerated cellulose fiber |
EP1292759B1 (de) * | 1999-12-29 | 2004-09-22 | TR Oil Services Limited | Verfahren zur änderung der permeabilität von einer unterirdischen kohlenwasserstoff enthaltenden formation |
US6408277B1 (en) * | 2000-06-21 | 2002-06-18 | Banter Limited | System and method for automatic task prioritization |
US6367550B1 (en) * | 2000-10-25 | 2002-04-09 | Halliburton Energy Service, Inc. | Foamed well cement slurries, additives and methods |
CA2443390C (en) * | 2001-04-16 | 2009-12-15 | Halliburton Energy Services, Inc. | Methods of treating subterranean zones penetrated by well bores |
US6823939B2 (en) | 2002-05-15 | 2004-11-30 | Halliburton Energy Services, Inc. | Methods of treating subterranean zones penetrated by well bores |
GB0219037D0 (en) * | 2002-08-15 | 2002-09-25 | Bp Exploration Operating | Process |
GB0229806D0 (en) * | 2002-12-20 | 2003-01-29 | Unilever Plc | Fabric care composition |
TW200422682A (en) * | 2003-04-29 | 2004-11-01 | Vanguard Int Semiconduct Corp | Method for fabricating Bragg Grating optical elements and planar light circuits made thereof |
BRPI0415764A (pt) | 2003-11-28 | 2006-12-26 | Eastman Chem Co | interpolìmero, produto de reação, métodos para converter uma hidroxila, para preparar uma forma estável de um interpolìmero, para converter um álcool primário, e para tratar um mamìfero necessitado do mesmo, composições para revestimento e farmacêutica oral, dispersão de pigmento, e, artigo |
US7093659B2 (en) * | 2004-03-22 | 2006-08-22 | Halliburton Energy Services, Inc. | Controlling chlorite or hypochlorite break rate of well treatment fluids using magnesium or calcium ions |
US7741424B2 (en) * | 2004-09-29 | 2010-06-22 | Kowa Co., Ltd. | Phosphoric ester of cellulose derivative and metal adsorbent comprising the same |
US7124822B2 (en) * | 2004-11-02 | 2006-10-24 | Halliburton Energy Services, Inc. | Foamed completion fluids and methods |
US8030249B2 (en) | 2005-01-28 | 2011-10-04 | Halliburton Energy Services, Inc. | Methods and compositions relating to the hydrolysis of water-hydrolysable materials |
US20060169182A1 (en) | 2005-01-28 | 2006-08-03 | Halliburton Energy Services, Inc. | Methods and compositions relating to the hydrolysis of water-hydrolysable materials |
US7264054B2 (en) * | 2005-04-07 | 2007-09-04 | Halliburton Energy Services, Inc. | Fluids comprising zirconium isopropylamine crosslinking agents and associated methods |
US7297665B2 (en) * | 2005-04-07 | 2007-11-20 | Halliburton Energy Services, Inc. | Fluids comprising zirconium isopropylamine crosslinking agents and associated methods |
US20070037713A1 (en) * | 2005-08-12 | 2007-02-15 | Halliburton Energy Services, Inc. | Methods and compositions for reducing the viscosity of treatment fluids used in subterranean operations |
US20070137529A1 (en) * | 2005-12-21 | 2007-06-21 | Jiten Chatterji | Cationic cellulose ethers as fluid loss control additives in cement compositions and associated methods |
US8590622B2 (en) * | 2006-02-10 | 2013-11-26 | Halliburton Energy Services, Inc. | Organic acid compositions and methods of use in subterranean operations |
US7122690B1 (en) | 2006-02-14 | 2006-10-17 | E. I. Du Pont De Nemours And Company | Process to prepare metal complex of N,N-bis(2-hydroxyethyl)glycine |
US7645725B2 (en) * | 2006-04-14 | 2010-01-12 | Halliburton Energy Services, Inc. | Subterranean treatment fluids with improved fluid loss control |
US7795185B2 (en) * | 2006-07-27 | 2010-09-14 | Halliburton Energy Services, Inc. | Magnesium peroxide difunctional components for cellulose derivatives and associated methods |
US7686080B2 (en) | 2006-11-09 | 2010-03-30 | Halliburton Energy Services, Inc. | Acid-generating fluid loss control additives and associated methods |
US8082994B2 (en) * | 2006-12-05 | 2011-12-27 | Halliburton Energy Services, Inc. | Methods for enhancing fracture conductivity in subterranean formations |
US8569214B2 (en) * | 2007-05-30 | 2013-10-29 | Halliburton Energy Services, Inc. | Methods of using polysaccharide based cement additives |
US8586508B2 (en) * | 2007-05-30 | 2013-11-19 | Halliburton Energy Services, Inc. | Polysaccharide based cement additives |
EA022202B1 (ru) * | 2008-05-05 | 2015-11-30 | Эм-Ай Эл.Эл.Си. | Способы и скважинные флюиды на водной основе для уменьшения поглощения скважинного флюида и поглощения фильтрата |
US7897545B2 (en) | 2008-08-08 | 2011-03-01 | Halliburton Energy Services, Inc. | Fluid loss compositions and methods of use for subterranean operations |
US8470747B2 (en) * | 2008-10-20 | 2013-06-25 | Halliburton Energy Services, Inc. | Carboxylic acid and oxidizer clean-up compositions and associated methods of use in subterranean applications |
US20100200230A1 (en) | 2009-02-12 | 2010-08-12 | East Jr Loyd | Method and Apparatus for Multi-Zone Stimulation |
US20100212906A1 (en) | 2009-02-20 | 2010-08-26 | Halliburton Energy Services, Inc. | Method for diversion of hydraulic fracture treatments |
US20100236784A1 (en) * | 2009-03-20 | 2010-09-23 | Horton Robert L | Miscible stimulation and flooding of petroliferous formations utilizing viscosified oil-based fluids |
US8932998B2 (en) | 2009-10-05 | 2015-01-13 | Baker Hughes Incorporated | Methods for crosslinking water soluble polymers for use in well applications |
US8770295B2 (en) | 2011-07-26 | 2014-07-08 | Halliburton Energy Services, Inc. | Thermally stable, nonionic foaming agent for foam fracturing fluids |
US9574437B2 (en) | 2011-07-29 | 2017-02-21 | Baker Hughes Incorporated | Viscometer for downhole use |
US20130048282A1 (en) | 2011-08-23 | 2013-02-28 | David M. Adams | Fracturing Process to Enhance Propping Agent Distribution to Maximize Connectivity Between the Formation and the Wellbore |
US8938380B2 (en) | 2012-02-29 | 2015-01-20 | Halliburton Energy Services, Inc. | Methods, devices, and kits relating to the implementation of gelled fluids having a transient gel microstructure |
US20130233559A1 (en) | 2012-03-07 | 2013-09-12 | Halliburton Energy Services, Inc. | Surfactant Additives for Stimulating Subterranean Formation During Fracturing Operations |
US9284476B2 (en) | 2012-09-15 | 2016-03-15 | Halliburton Energy Services, Inc. | Treatment fluids comprising magnetic surfactants and methods relating thereto |
US9879503B2 (en) | 2012-09-19 | 2018-01-30 | Halliburton Energy Services, Inc. | Methods of treating long-interval and high-contrast permeability subterranean formations with diverting fluids |
EP2885370A1 (de) | 2012-10-30 | 2015-06-24 | Halliburton Energy Services, Inc. | Bohrflüssigkeitszusammensetzungen und verfahren zur verwendung in unterirdischen formationen |
US9790416B2 (en) | 2012-10-30 | 2017-10-17 | Halliburton Energy Services, Inc. | Drilling fluid compositions and methods for use thereof in subterranean formations |
US9279077B2 (en) | 2012-11-09 | 2016-03-08 | Halliburton Energy Services, Inc. | Methods of forming and placing proppant pillars into a subterranean formation |
US9243183B2 (en) | 2012-11-28 | 2016-01-26 | Halliburton Energy Services, Inc. | Methods of treating a subterranean formation with thermally activated suspending agents |
US20140148369A1 (en) | 2012-11-28 | 2014-05-29 | Halliburton Energy Services, Inc. | Methods of Treating a Subterranean Formation with Friction Reducing Clays |
US9677386B2 (en) | 2013-02-28 | 2017-06-13 | Halliburton Energy Services, Inc. | Methods of stabilizing weakly consolidated subterranean formation intervals |
US8935957B2 (en) | 2013-03-13 | 2015-01-20 | Halliburton Energy Services, Inc. | Methods of designing a drilling fluid having suspendable loss circulation material |
US9027648B2 (en) | 2013-03-18 | 2015-05-12 | Halliburton Engergy Services, Inc. | Methods of treating a subterranean formation with one-step furan resin compositions |
US9487692B2 (en) | 2013-03-19 | 2016-11-08 | Halliburton Energy Services, Inc. | Methods for consolidation treatments in subterranean formations using silicon compounds derived from furfuryl alcohols |
US9862876B2 (en) | 2013-04-22 | 2018-01-09 | Halliburton Energy Services, Inc. | Methods and compositions of treating subterranean formations with a novel resin system |
US9494026B2 (en) | 2013-04-22 | 2016-11-15 | Halliburton Energy Services, Inc. | Methods and compositions of treating subterranean formations with a novel resin system |
US9475976B2 (en) | 2013-05-20 | 2016-10-25 | Halliburton Energy Services, Inc. | Methods and compositions of improving wellbore cleanout treatments |
US9695350B2 (en) | 2013-05-31 | 2017-07-04 | Halliburton Energy Services, Inc. | Ampholyte polymeric compounds in subterranean applications |
US9739132B2 (en) | 2013-08-07 | 2017-08-22 | Baker Hughes Incorporated | Well treatment fluids and methods |
US9562423B2 (en) | 2013-08-27 | 2017-02-07 | Halliburton Energy Services, Inc. | Acid diversion treatments in injection wells using permeability modifiers |
US9862875B2 (en) | 2013-10-29 | 2018-01-09 | Halliburton Energy Services, Inc. | Drill-in fluids comprising nanoparticulates for consolidating subterranean formations while drilling |
GB2535660B (en) | 2013-10-30 | 2020-09-23 | Halliburton Energy Services Inc | Vulcanized oil and water swellable particulate composite compositions |
AU2014405605B2 (en) | 2014-09-02 | 2017-10-05 | Halliburton Energy Services, Inc. | Enhancing complex fracture networks in subterranean formations |
US11009175B2 (en) | 2014-12-18 | 2021-05-18 | Curapipe System Ltd. | Systems and method for sealing pipelines using a gel pig |
WO2016098093A1 (en) * | 2014-12-18 | 2016-06-23 | Curapipe System Ltd. | Systems and method for sealing pipelines using a gel pig |
CN113429585B (zh) * | 2021-07-07 | 2022-09-09 | 华纺股份有限公司 | 一种可以循环操作的制备纳米纤维素悬浮液的方法 |
US12018206B2 (en) | 2021-12-07 | 2024-06-25 | Lyondellbasell Advanced Polymers Inc. | Drill-in fluid compositions and methods |
Family Cites Families (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1162342B (de) * | 1955-09-21 | 1964-02-06 | Polymer Corp | Verfahren zum Aufpfropfen von Monomeren auf Polysaccharide und Proteine oder deren Derivate |
US2922768A (en) * | 1956-04-12 | 1960-01-26 | Mino Guido | Process for polymerization of a vinylidene monomer in the presence of a ceric salt and an organic reducing agent |
US3341483A (en) * | 1961-08-30 | 1967-09-12 | Yissum Res Dev Co | Anionic graft polymerization of vinyl monomers on natural polyhydroxy compounds, their derivatives and on synthetic polyhydroxy polymers |
GB1088672A (en) * | 1963-10-03 | 1967-10-25 | Ici Ltd | Reactions of polymeric materials with vinyl phosphonium compounds |
US3359224A (en) * | 1966-07-06 | 1967-12-19 | Scott Paper Co | Thioated cellulosic/amylaceous substrate-ethylenically unsaturated monomer graft copolymer |
US3488210A (en) * | 1966-11-03 | 1970-01-06 | Fmc Corp | Cellulosic graft polymerization process with suppression of homopolymer formation |
US3682632A (en) * | 1968-06-14 | 1972-08-08 | Ricoh Kk | Copying material for use in electrophotography |
US3640826A (en) * | 1968-09-04 | 1972-02-08 | Int Minerals & Chem Corp | Graft copolymers of acrylic acid and polyhydroxy polymeric compounds for treating clays |
US3607799A (en) * | 1969-10-24 | 1971-09-21 | Eastman Kodak Co | Processes for grafting vinyl-type compounds to cellulosic materials |
US3727688A (en) * | 1972-02-09 | 1973-04-17 | Phillips Petroleum Co | Hydraulic fracturing method |
US3845822A (en) * | 1972-02-09 | 1974-11-05 | Phillips Petroleum Co | Plugging or sealing fractures in formations |
US4135943A (en) * | 1973-05-31 | 1979-01-23 | Toyo Jozo Company, Ltd. | Novel selective adsorbents |
US3977954A (en) * | 1973-08-22 | 1976-08-31 | The Regents Of The University Of California | Sensitized vapor phase photo-grafting of monomers onto surfaces |
US3888312A (en) * | 1974-04-29 | 1975-06-10 | Halliburton Co | Method and compositions for fracturing well formations |
US3943996A (en) * | 1974-10-30 | 1976-03-16 | Calgon Corporation | Low fluid loss cementing compositions |
US3971440A (en) * | 1975-09-10 | 1976-07-27 | Phillips Petroleum Company | Method for treating subterranean formations with cellulose ether-polyacrylamide aqueous gels |
US4174309A (en) * | 1976-07-26 | 1979-11-13 | Mobil Oil Corporation | Polyisocyanate cross-linked alkylene oxide-linear non-ionic polysaccharide reaction product |
US4131576A (en) * | 1977-12-15 | 1978-12-26 | National Starch And Chemical Corporation | Process for the preparation of graft copolymers of a water soluble monomer and polysaccharide employing a two-phase reaction system |
JPS53130789A (en) * | 1978-04-27 | 1978-11-15 | Sanyo Chem Ind Ltd | Preparation of water absorbing resin |
US4324668A (en) * | 1978-10-02 | 1982-04-13 | Halliburton Company | High viscosity acidic treating fluids and methods of forming and using the same |
US4352902A (en) * | 1980-01-08 | 1982-10-05 | Kansai Paint Co., Ltd. | Emulsion composition containing cellulose derivative |
US4415703A (en) * | 1981-01-13 | 1983-11-15 | Daicel Chemical Industries, Ltd. | Aqueous dispersion of a cellulose derivative |
JPS5823847A (ja) * | 1981-08-04 | 1983-02-12 | Kansai Paint Co Ltd | 繊維素誘導体含有エマルシヨン組成物 |
US4566976A (en) * | 1981-12-14 | 1986-01-28 | Nl Industries, Inc. | Viscous heavy brines |
US4540742A (en) * | 1982-11-12 | 1985-09-10 | The B. F. Goodrich Company | Graft copolymers and process for their preparation |
JPS59145210A (ja) * | 1983-02-08 | 1984-08-20 | Agency Of Ind Science & Technol | 高分子多糖グラフト共重合体の合成法 |
US4555468A (en) * | 1983-05-04 | 1985-11-26 | Daicel Chemical Industries, Ltd. | Photosensitive diazonium material with precoat of graft polymer prepared by grafting cellulose derivation with radical polymerizable monomer |
US4552674A (en) * | 1983-08-19 | 1985-11-12 | Fmc Corporation | Composition and method for treating a subterranean formation |
US4540510A (en) * | 1984-02-13 | 1985-09-10 | Henkel Corporation | Synergistic thickener mixtures of amps polymers with other thickeners |
US4523010A (en) * | 1984-06-15 | 1985-06-11 | Hercules Incorporated | Dihydroxypropyl mixed ether derivatives of cellulose |
US4552668A (en) * | 1984-07-30 | 1985-11-12 | Fmc Corporation | Oxidation of sulfides in polymer-thickened aqueous solution |
US4552215A (en) * | 1984-09-26 | 1985-11-12 | Halliburton Company | Method of gravel packing a well |
JPH0613586B2 (ja) * | 1984-10-17 | 1994-02-23 | ダイセル化学工業株式会社 | 高吸収性素材 |
US4549907A (en) * | 1984-12-20 | 1985-10-29 | Celanese Corporation | Thixotropic aqueous solutions containing a crosslinked polygalactomannan gum |
US4690996A (en) * | 1985-08-28 | 1987-09-01 | National Starch And Chemical Corporation | Inverse emulsions |
US4982793A (en) * | 1989-03-10 | 1991-01-08 | Halliburton Company | Crosslinkable cellulose derivatives |
-
1990
- 1990-10-04 US US07/592,770 patent/US5067565A/en not_active Expired - Lifetime
-
1991
- 1991-10-04 DE DE69111359T patent/DE69111359T2/de not_active Expired - Fee Related
- 1991-10-04 EP EP91309109A patent/EP0479606B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0479606A1 (de) | 1992-04-08 |
EP0479606B1 (de) | 1995-07-19 |
DE69111359T2 (de) | 1996-01-04 |
US5067565A (en) | 1991-11-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |