GB1359734A - Foams impregnated with aqueous polyurethane dispersions and a process for impregnating foams - Google Patents
Foams impregnated with aqueous polyurethane dispersions and a process for impregnating foamsInfo
- Publication number
- GB1359734A GB1359734A GB2917471A GB2917471A GB1359734A GB 1359734 A GB1359734 A GB 1359734A GB 2917471 A GB2917471 A GB 2917471A GB 2917471 A GB2917471 A GB 2917471A GB 1359734 A GB1359734 A GB 1359734A
- Authority
- GB
- United Kingdom
- Prior art keywords
- foams
- impregnated
- foam
- impregnating
- polyurethane
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/83—Chemically modified polymers
- C08G18/84—Chemically modified polymers by aldehydes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
1359734 Impregnating foams BAYER AG 22 June 1971 [24 June 1970] 29174/71 Heading B2E [Also in Division C3] Foam is impregnated with an aqueous dispersion of a polyurethane which in the homogeneous fully reacted form has a Shore A hardness (DIN 53505) of at least 5 and a pendulum hardness (DIN 53157) of at most 240. The foam itself may be a polyvinyl chloride, latex, natural or a polyurethane foam. Any polyisocyanate may be used to prepare polyurethane foams and numerous examples are provided. Additionally polyhydroxy polyethers may be incorporated. Impregnation may be effected by alternate compression and relaxation. Drying may be effected by wringing out and heating at 130‹C for ¢ hour. Fireproofing effects can be achieved by incorporation of polymethylene urea, antimony compounds, red phosphorous and other fireretarding fillers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702031160 DE2031160C3 (en) | 1970-06-24 | 1970-06-24 | Process for impregnating foams with polrethanes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1359734A true GB1359734A (en) | 1974-07-10 |
Family
ID=5774811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2917471A Expired GB1359734A (en) | 1970-06-24 | 1971-06-22 | Foams impregnated with aqueous polyurethane dispersions and a process for impregnating foams |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT313591B (en) |
| BE (1) | BE769002A (en) |
| CH (1) | CH564045A5 (en) |
| DE (1) | DE2031160C3 (en) |
| ES (1) | ES392533A1 (en) |
| FR (1) | FR2096471B1 (en) |
| GB (1) | GB1359734A (en) |
| NL (1) | NL7108744A (en) |
Cited By (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288559A (en) | 1978-11-16 | 1981-09-08 | Bayer Aktiengesellschaft | Flame resistant foam |
| US4324835A (en) | 1979-06-05 | 1982-04-13 | Dunlop Limited | Cellular intumescent materials |
| GB2121316A (en) * | 1982-06-01 | 1983-12-21 | John Albert Avery Bradbury | Composite foamed articles and process for their production |
| US4698369A (en) * | 1984-12-20 | 1987-10-06 | Dunlop Limited A British Company | Flexible, flame-retardant polyurethane foams |
| WO2010147710A1 (en) * | 2009-06-16 | 2010-12-23 | The Boeing Company | Flame propagation resistant foam and method |
| US9404581B1 (en) | 2014-02-28 | 2016-08-02 | Schul International Company, LLC | Joint seal system |
| US9528262B2 (en) | 2008-11-20 | 2016-12-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion joint system |
| US9631362B2 (en) | 2008-11-20 | 2017-04-25 | Emseal Joint Systems Ltd. | Precompressed water and/or fire resistant tunnel expansion joint systems, and transitions |
| US9637915B1 (en) | 2008-11-20 | 2017-05-02 | Emseal Joint Systems Ltd. | Factory fabricated precompressed water and/or fire resistant expansion joint system transition |
| US9670666B1 (en) | 2008-11-20 | 2017-06-06 | Emseal Joint Sytstems Ltd. | Fire and water resistant expansion joint system |
| US9689157B1 (en) | 2009-03-24 | 2017-06-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion and seismic joint system |
| US9689158B1 (en) | 2009-03-24 | 2017-06-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion and seismic joint system |
| US9739050B1 (en) | 2011-10-14 | 2017-08-22 | Emseal Joint Systems Ltd. | Flexible expansion joint seal system |
| US9745738B2 (en) | 2015-12-30 | 2017-08-29 | Schul International Company, LLC | Expansion joint for longitudinal load transfer |
| US9765486B1 (en) | 2016-03-07 | 2017-09-19 | Schul International Company, LLC | Expansion joint seal for surface contact applications |
| US9803357B1 (en) | 2016-07-22 | 2017-10-31 | Schul International Company, LLC | Expansion joint seal system providing fire retardancy |
| US9915038B2 (en) | 2016-03-07 | 2018-03-13 | Schul International Company, LLC | Durable joint seal system with detachable cover plate and rotatable ribs |
| US9963872B2 (en) | 2012-11-16 | 2018-05-08 | Emseal Joint Systems LTD | Expansion joint system |
| US9982428B2 (en) | 2015-12-30 | 2018-05-29 | Schul International Company, LLC | Expansion joint seal with surface load transfer, intumescent, and internal sensor |
| US9982429B2 (en) | 2015-03-10 | 2018-05-29 | Schul International Company, LLC | Expansion joint seal system |
| US10060122B2 (en) | 2015-03-10 | 2018-08-28 | Schul International Company, LLC | Expansion joint seal system |
| US10066386B2 (en) | 2015-12-30 | 2018-09-04 | Schul International Company, LLC | Expansion joint seal with surface load transfer and intumescent |
| US10081939B1 (en) | 2016-07-22 | 2018-09-25 | Schul International Company, LLC | Fire retardant expansion joint seal system with internal resilient members and intumescent members |
| US10087621B1 (en) | 2015-03-10 | 2018-10-02 | Schul International Company, LLC | Expansion joint seal system with isolated temperature-activated fire retarding members |
| US10087620B1 (en) | 2016-07-22 | 2018-10-02 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible body members, resilient members, and fire retardants |
| US10087619B1 (en) | 2016-07-22 | 2018-10-02 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible members and resilient members |
| US10125490B2 (en) | 2016-07-22 | 2018-11-13 | Schul International Company, LLC | Expansion joint seal system with internal intumescent springs providing fire retardancy |
| US10213962B2 (en) | 2015-12-30 | 2019-02-26 | Schul International Company, LLC | Expansion joint seal with load transfer and flexion |
| US10227734B1 (en) | 2017-12-26 | 2019-03-12 | Veloxion, Inc. | Helically-packaged expansion joint seal system |
| US10240302B2 (en) | 2016-03-07 | 2019-03-26 | Schul International Company, LLC | Durable joint seal system with detachable cover plate and rotatable ribs |
| US10280610B1 (en) | 2016-07-22 | 2019-05-07 | Schul International Company, LLC | Vapor-permeable water and fire-resistant expansion joint seal |
| US10280611B1 (en) | 2016-07-22 | 2019-05-07 | Schul International Company, LLC | Vapor permeable water and fire-resistant expansion joint seal |
| US10316661B2 (en) | 2008-11-20 | 2019-06-11 | Emseal Joint Systems, Ltd. | Water and/or fire resistant tunnel expansion joint systems |
| US10323408B1 (en) | 2016-07-22 | 2019-06-18 | Schul International Company, LLC | Durable water and fire-resistant tunnel expansion joint seal |
| US10323409B1 (en) | 2018-07-12 | 2019-06-18 | Schul International Company, LLC | Expansion joint system with flexible sheeting |
| US10323407B1 (en) | 2016-07-22 | 2019-06-18 | Schul International Company, LLC | Water and fire-resistant expansion joint seal |
| US10344471B1 (en) | 2016-07-22 | 2019-07-09 | Schull International Company, LLC | Durable water and fire-resistant expansion joint seal |
| US10352003B2 (en) | 2016-03-07 | 2019-07-16 | Schul International Company, LLC | Expansion joint seal system with spring centering |
| US10352039B2 (en) | 2016-03-07 | 2019-07-16 | Schul International Company, LLC | Durable joint seal system with cover plate and ribs |
| US10358813B2 (en) | 2016-07-22 | 2019-07-23 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible body members, internal spring members, and connector |
| US10480654B2 (en) | 2014-02-28 | 2019-11-19 | Schul International Co., Llc | Joint seal system having internal barrier and external wings |
| US10851541B2 (en) | 2018-03-05 | 2020-12-01 | Schul International Co., Llc | Expansion joint seal for surface contact with offset rail |
| US10851542B2 (en) | 2008-11-20 | 2020-12-01 | Emseal Joint Systems Ltd. | Fire and water resistant, integrated wall and roof expansion joint seal system |
| US11180995B2 (en) | 2008-11-20 | 2021-11-23 | Emseal Joint Systems, Ltd. | Water and/or fire resistant tunnel expansion joint systems |
| US11325344B2 (en) | 2019-01-25 | 2022-05-10 | Faurecia Sieges D'automobile | Back panel of a seat element |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1495721A (en) * | 1974-02-14 | 1977-12-21 | Gen Foam Prod Ltd | Resilient waterproof material |
| GB1519795A (en) * | 1975-11-06 | 1978-08-02 | Dunlop Ltd | Foams |
| JPS5744636A (en) * | 1980-09-01 | 1982-03-13 | Wako Chem Kk | Impregnating agent for preparing mainly semirigid or rigid resin foam |
| DE3536371C1 (en) * | 1985-10-11 | 1987-05-07 | Metzeler Schaum Gmbh | Flame retardant polyurethane foam |
| ATE236941T1 (en) | 1998-12-29 | 2003-04-15 | Dow Global Technologies Inc | POLYURETHANE FOAM PRODUCED FROM MECHANICALLY FOAMED POLYURETHANE DISPERSIONS |
| DE10211274B4 (en) * | 2002-03-13 | 2012-08-23 | Basf Se | Subsequent cured foams, process for their preparation and their use |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1729201C3 (en) * | 1967-06-16 | 1978-09-28 | Bayer Ag, 5090 Leverkusen | Process for the production of polyurethane powders |
| GB1206993A (en) * | 1968-02-09 | 1970-09-30 | Revertex Ltd | Improvements in or relating to the treatment of foams |
-
1970
- 1970-06-24 DE DE19702031160 patent/DE2031160C3/en not_active Expired
-
1971
- 1971-06-22 ES ES392533A patent/ES392533A1/en not_active Expired
- 1971-06-22 GB GB2917471A patent/GB1359734A/en not_active Expired
- 1971-06-22 AT AT540271A patent/AT313591B/en not_active IP Right Cessation
- 1971-06-23 CH CH916671A patent/CH564045A5/xx not_active IP Right Cessation
- 1971-06-24 FR FR7123128A patent/FR2096471B1/fr not_active Expired
- 1971-06-24 BE BE769002A patent/BE769002A/en not_active IP Right Cessation
- 1971-06-24 NL NL7108744A patent/NL7108744A/xx unknown
Cited By (66)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288559A (en) | 1978-11-16 | 1981-09-08 | Bayer Aktiengesellschaft | Flame resistant foam |
| US4342798A (en) | 1978-11-16 | 1982-08-03 | Bayer Aktiengesellschaft | Process for production of flame resistant foam |
| US4324835A (en) | 1979-06-05 | 1982-04-13 | Dunlop Limited | Cellular intumescent materials |
| GB2121316A (en) * | 1982-06-01 | 1983-12-21 | John Albert Avery Bradbury | Composite foamed articles and process for their production |
| US4698369A (en) * | 1984-12-20 | 1987-10-06 | Dunlop Limited A British Company | Flexible, flame-retardant polyurethane foams |
| US11180995B2 (en) | 2008-11-20 | 2021-11-23 | Emseal Joint Systems, Ltd. | Water and/or fire resistant tunnel expansion joint systems |
| US10316661B2 (en) | 2008-11-20 | 2019-06-11 | Emseal Joint Systems, Ltd. | Water and/or fire resistant tunnel expansion joint systems |
| US10179993B2 (en) | 2008-11-20 | 2019-01-15 | Emseal Joint Systems, Ltd. | Water and/or fire resistant expansion joint system |
| US9528262B2 (en) | 2008-11-20 | 2016-12-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion joint system |
| US9631362B2 (en) | 2008-11-20 | 2017-04-25 | Emseal Joint Systems Ltd. | Precompressed water and/or fire resistant tunnel expansion joint systems, and transitions |
| US9637915B1 (en) | 2008-11-20 | 2017-05-02 | Emseal Joint Systems Ltd. | Factory fabricated precompressed water and/or fire resistant expansion joint system transition |
| US9644368B1 (en) | 2008-11-20 | 2017-05-09 | Emseal Joint Systems Ltd. | Fire and water resistant expansion joint system |
| US9670666B1 (en) | 2008-11-20 | 2017-06-06 | Emseal Joint Sytstems Ltd. | Fire and water resistant expansion joint system |
| US10794056B2 (en) | 2008-11-20 | 2020-10-06 | Emseal Joint Systems Ltd. | Water and/or fire resistant expansion joint system |
| US10851542B2 (en) | 2008-11-20 | 2020-12-01 | Emseal Joint Systems Ltd. | Fire and water resistant, integrated wall and roof expansion joint seal system |
| US10934704B2 (en) | 2008-11-20 | 2021-03-02 | Emseal Joint Systems Ltd. | Fire and/or water resistant expansion joint system |
| US10519651B2 (en) | 2008-11-20 | 2019-12-31 | Emseal Joint Systems Ltd. | Fire resistant tunnel expansion joint systems |
| US11459748B2 (en) | 2008-11-20 | 2022-10-04 | Emseal Joint Systems, Ltd. | Fire resistant expansion joint systems |
| US10934702B2 (en) | 2008-11-20 | 2021-03-02 | Emseal Joint Systems Ltd. | Fire and water resistant expansion joint system |
| US10941562B2 (en) | 2008-11-20 | 2021-03-09 | Emseal Joint Systems Ltd. | Fire and water resistant expansion joint system |
| US9689157B1 (en) | 2009-03-24 | 2017-06-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion and seismic joint system |
| US9689158B1 (en) | 2009-03-24 | 2017-06-27 | Emseal Joint Systems Ltd. | Fire and water resistant expansion and seismic joint system |
| US10787806B2 (en) | 2009-03-24 | 2020-09-29 | Emseal Joint Systems Ltd. | Fire and/or water resistant expansion and seismic joint system |
| US10787805B2 (en) | 2009-03-24 | 2020-09-29 | Emseal Joint Systems Ltd. | Fire and/or water resistant expansion and seismic joint system |
| US9347004B2 (en) | 2009-06-16 | 2016-05-24 | The Boeing Company | Flame propagation resistant foam and method |
| WO2010147710A1 (en) * | 2009-06-16 | 2010-12-23 | The Boeing Company | Flame propagation resistant foam and method |
| EP3293223A1 (en) * | 2009-06-16 | 2018-03-14 | The Boeing Company | Preparation of a flame propagation resistant foam |
| US9739050B1 (en) | 2011-10-14 | 2017-08-22 | Emseal Joint Systems Ltd. | Flexible expansion joint seal system |
| US10544582B2 (en) | 2012-11-16 | 2020-01-28 | Emseal Joint Systems Ltd. | Expansion joint system |
| US9963872B2 (en) | 2012-11-16 | 2018-05-08 | Emseal Joint Systems LTD | Expansion joint system |
| US10203035B1 (en) | 2014-02-28 | 2019-02-12 | Schul International Company, LLC | Joint seal system |
| US10480654B2 (en) | 2014-02-28 | 2019-11-19 | Schul International Co., Llc | Joint seal system having internal barrier and external wings |
| US9404581B1 (en) | 2014-02-28 | 2016-08-02 | Schul International Company, LLC | Joint seal system |
| US9982429B2 (en) | 2015-03-10 | 2018-05-29 | Schul International Company, LLC | Expansion joint seal system |
| US9995036B1 (en) | 2015-03-10 | 2018-06-12 | Schul International Company, LLC | Expansion joint seal system with top and side intumescent members |
| US10060122B2 (en) | 2015-03-10 | 2018-08-28 | Schul International Company, LLC | Expansion joint seal system |
| US10087621B1 (en) | 2015-03-10 | 2018-10-02 | Schul International Company, LLC | Expansion joint seal system with isolated temperature-activated fire retarding members |
| US9856641B2 (en) | 2015-12-30 | 2018-01-02 | Schul International Company, LLC | Expansion joint for longitudinal load transfer |
| US10213962B2 (en) | 2015-12-30 | 2019-02-26 | Schul International Company, LLC | Expansion joint seal with load transfer and flexion |
| US10066386B2 (en) | 2015-12-30 | 2018-09-04 | Schul International Company, LLC | Expansion joint seal with surface load transfer and intumescent |
| US9982428B2 (en) | 2015-12-30 | 2018-05-29 | Schul International Company, LLC | Expansion joint seal with surface load transfer, intumescent, and internal sensor |
| US9951515B2 (en) | 2015-12-30 | 2018-04-24 | Schul International Company, LLC | Expansion joint seal with surface load transfer and intumescent |
| US9745738B2 (en) | 2015-12-30 | 2017-08-29 | Schul International Company, LLC | Expansion joint for longitudinal load transfer |
| US10352039B2 (en) | 2016-03-07 | 2019-07-16 | Schul International Company, LLC | Durable joint seal system with cover plate and ribs |
| US10358777B2 (en) | 2016-03-07 | 2019-07-23 | Schul International Company, LLC | Durable joint seal system without cover plate and with rotatable ribs |
| US9765486B1 (en) | 2016-03-07 | 2017-09-19 | Schul International Company, LLC | Expansion joint seal for surface contact applications |
| US9840814B2 (en) | 2016-03-07 | 2017-12-12 | Schul International Company, LLC | Expansion joint seal for surface contact applications |
| US9915038B2 (en) | 2016-03-07 | 2018-03-13 | Schul International Company, LLC | Durable joint seal system with detachable cover plate and rotatable ribs |
| US10352003B2 (en) | 2016-03-07 | 2019-07-16 | Schul International Company, LLC | Expansion joint seal system with spring centering |
| US10240302B2 (en) | 2016-03-07 | 2019-03-26 | Schul International Company, LLC | Durable joint seal system with detachable cover plate and rotatable ribs |
| US10081939B1 (en) | 2016-07-22 | 2018-09-25 | Schul International Company, LLC | Fire retardant expansion joint seal system with internal resilient members and intumescent members |
| US10000921B1 (en) | 2016-07-22 | 2018-06-19 | Schul International Company, LLC | Expansion joint seal system with internal intumescent springs providing fire retardancy |
| US10280610B1 (en) | 2016-07-22 | 2019-05-07 | Schul International Company, LLC | Vapor-permeable water and fire-resistant expansion joint seal |
| US10280611B1 (en) | 2016-07-22 | 2019-05-07 | Schul International Company, LLC | Vapor permeable water and fire-resistant expansion joint seal |
| US9803357B1 (en) | 2016-07-22 | 2017-10-31 | Schul International Company, LLC | Expansion joint seal system providing fire retardancy |
| US10125490B2 (en) | 2016-07-22 | 2018-11-13 | Schul International Company, LLC | Expansion joint seal system with internal intumescent springs providing fire retardancy |
| US10087619B1 (en) | 2016-07-22 | 2018-10-02 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible members and resilient members |
| US10087620B1 (en) | 2016-07-22 | 2018-10-02 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible body members, resilient members, and fire retardants |
| US10323407B1 (en) | 2016-07-22 | 2019-06-18 | Schul International Company, LLC | Water and fire-resistant expansion joint seal |
| US10323408B1 (en) | 2016-07-22 | 2019-06-18 | Schul International Company, LLC | Durable water and fire-resistant tunnel expansion joint seal |
| US10358813B2 (en) | 2016-07-22 | 2019-07-23 | Schul International Company, LLC | Fire retardant expansion joint seal system with elastically-compressible body members, internal spring members, and connector |
| US10344471B1 (en) | 2016-07-22 | 2019-07-09 | Schull International Company, LLC | Durable water and fire-resistant expansion joint seal |
| US10227734B1 (en) | 2017-12-26 | 2019-03-12 | Veloxion, Inc. | Helically-packaged expansion joint seal system |
| US10851541B2 (en) | 2018-03-05 | 2020-12-01 | Schul International Co., Llc | Expansion joint seal for surface contact with offset rail |
| US10323409B1 (en) | 2018-07-12 | 2019-06-18 | Schul International Company, LLC | Expansion joint system with flexible sheeting |
| US11325344B2 (en) | 2019-01-25 | 2022-05-10 | Faurecia Sieges D'automobile | Back panel of a seat element |
Also Published As
| Publication number | Publication date |
|---|---|
| AT313591B (en) | 1974-02-25 |
| FR2096471A1 (en) | 1972-02-18 |
| DE2031160A1 (en) | 1971-12-30 |
| BE769002A (en) | 1971-11-03 |
| DE2031160B2 (en) | 1977-11-03 |
| NL7108744A (en) | 1971-12-28 |
| FR2096471B1 (en) | 1975-07-11 |
| DE2031160C3 (en) | 1978-06-22 |
| CH564045A5 (en) | 1975-07-15 |
| ES392533A1 (en) | 1973-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |