GB1485925A - Production of alkylene carbonates - Google Patents
Production of alkylene carbonatesInfo
- Publication number
- GB1485925A GB1485925A GB10095/76A GB1009576A GB1485925A GB 1485925 A GB1485925 A GB 1485925A GB 10095/76 A GB10095/76 A GB 10095/76A GB 1009576 A GB1009576 A GB 1009576A GB 1485925 A GB1485925 A GB 1485925A
- Authority
- GB
- United Kingdom
- Prior art keywords
- production
- alkylene carbonates
- carbonates
- alkylene
- 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
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/10—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings
- C07D317/32—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D317/34—Oxygen atoms
- C07D317/36—Alkylene carbonates; Substituted alkylene carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Polyesters Or Polycarbonates (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21320/75A IT1034323B (it) | 1975-03-17 | 1975-03-17 | Procedimento per la preparazione di alchilencarbonati |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1485925A true GB1485925A (en) | 1977-09-14 |
Family
ID=11180058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10095/76A Expired GB1485925A (en) | 1975-03-17 | 1976-03-12 | Production of alkylene carbonates |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS51118763A (da) |
| BE (1) | BE839609A (da) |
| CA (1) | CA1076590A (da) |
| CH (1) | CH620434A5 (da) |
| DE (1) | DE2611087C3 (da) |
| DK (1) | DK145300C (da) |
| ES (1) | ES446341A1 (da) |
| FR (1) | FR2304609A1 (da) |
| GB (1) | GB1485925A (da) |
| IE (1) | IE43215B1 (da) |
| IT (1) | IT1034323B (da) |
| LU (1) | LU74557A1 (da) |
| NL (1) | NL171706C (da) |
| NO (1) | NO144263C (da) |
| SE (1) | SE426944B (da) |
| ZA (1) | ZA761449B (da) |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119840A1 (en) * | 1983-03-18 | 1984-09-26 | BP Chemicals Limited | Preparation of carbonates |
| EP0212409A2 (de) * | 1985-08-16 | 1987-03-04 | Hoechst Aktiengesellschaft | Verfahren zur Herstellung von 2-oxo-1,3-dioxolanen |
| US4786741A (en) * | 1982-11-15 | 1988-11-22 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US4841072A (en) * | 1981-12-02 | 1989-06-20 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US5023345A (en) * | 1981-12-02 | 1991-06-11 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US5138073A (en) * | 1981-12-02 | 1992-08-11 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US5712363A (en) * | 1993-01-06 | 1998-01-27 | Akzo Nobel Nv | Oligomeric sterically hindered polyamine crosslinkers and coating compositions containing the same |
| US6077929A (en) * | 1996-10-09 | 2000-06-20 | Akzo Nobel N.V. | Internally blocked polyamine crosslinkers and coating compositions containing the same |
| CN107021488A (zh) * | 2016-02-01 | 2017-08-08 | 新绿科学股份有限公司 | 金属碳酸盐的制造方法以及该制造方法中所使用的催化剂 |
| WO2017186899A1 (en) | 2016-04-29 | 2017-11-02 | Henkel Ag & Co. Kgaa | Amine-functional polymers and methods for producing such polymers |
| EP3401348A1 (en) | 2017-05-11 | 2018-11-14 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| EP3409707A1 (en) | 2017-05-30 | 2018-12-05 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| EP3428216A1 (en) | 2017-07-11 | 2019-01-16 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| WO2019243067A1 (en) | 2018-06-19 | 2019-12-26 | Henkel Ag & Co. Kgaa | Highly active double metal cyanide compounds |
| EP3725820A1 (en) | 2019-04-16 | 2020-10-21 | Henkel AG & Co. KGaA | Use of functionalized alpha-angelica lactones |
| WO2021004624A1 (en) | 2019-07-09 | 2021-01-14 | Henkel Ag & Co. Kgaa | Two component (2k) composition based on modified epoxy resins |
| EP3798246A1 (en) | 2019-09-27 | 2021-03-31 | Henkel AG & Co. KGaA | One component (1k) composition based on modified epoxy resin |
| EP3831862A1 (en) | 2019-12-04 | 2021-06-09 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| EP3831863A1 (en) | 2019-12-04 | 2021-06-09 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| EP3835383A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | One component (1k) curable adhesive composition |
| EP3835386A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| EP3835378A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| EP3835381A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| EP3916033A1 (en) | 2020-05-28 | 2021-12-01 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| EP3943564A1 (en) | 2020-07-21 | 2022-01-26 | Henkel AG & Co. KGaA | Room temperature stable, electrically conductive 1k epoxy formulation |
| WO2022043160A1 (en) | 2020-08-27 | 2022-03-03 | Henkel Ag & Co. Kgaa | Electrically conductive one component (1k) epoxy formulation |
| WO2022081271A1 (en) | 2020-10-13 | 2022-04-21 | Cabot Corporation | Conductive photo-curable compositions for additive manufacturing |
| EP4015557A1 (en) | 2020-12-21 | 2022-06-22 | Henkel AG & Co. KGaA | Two component (2k) epoxy formulation |
| EP4050060A1 (en) | 2021-02-26 | 2022-08-31 | Henkel AG & Co. KGaA | A photocurable adhesive or sealant composition |
| EP4050061A1 (en) | 2021-02-26 | 2022-08-31 | Henkel AG & Co. KGaA | Near-infrared (nir) sensitized adhesive and sealant compositions |
| EP4159784A1 (en) | 2021-09-30 | 2023-04-05 | Henkel AG & Co. KGaA | Two component (2k) composition based on epoxy (meth)acrylate resin |
| WO2023241875A1 (en) | 2022-06-17 | 2023-12-21 | Henkel Ag & Co. Kgaa | Two component (2k) curable adhesive composition |
| EP4332144A1 (en) | 2022-09-05 | 2024-03-06 | Henkel AG & Co. KGaA | One component (1k) curable adhesive composition |
| WO2024078879A1 (en) | 2022-10-12 | 2024-04-18 | Henkel Ag & Co. Kgaa | Two component (2k) epoxy formulation |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4314945A (en) * | 1977-12-22 | 1982-02-09 | Union Carbide Corporation | Alkylene carbonate process |
| DE3600602A1 (de) * | 1986-01-11 | 1987-07-16 | Hoechst Ag | Verfahren zur herstellung von 2-oxo-1,3-dioxolanen |
| DE4105554A1 (de) | 1991-02-22 | 1992-08-27 | Bayer Ag | Verfahren zur herstellung von dialkylcarbonaten |
| DE4129753C2 (de) * | 1991-09-04 | 1995-05-04 | Dainippon Ink & Chemicals | Verfahren zur Herstellung von Cyclocarbonatverbindungen |
| WO2010089264A1 (de) | 2009-02-05 | 2010-08-12 | Basf Se | Verfahren zur herstellung von biscarbonaten |
| DE102015113351A1 (de) | 2014-09-20 | 2016-03-24 | Fischerwerke Gmbh & Co. Kg | Härtbares Kunstharz mit erheblichen Anteilen an cyclischen Carbonatgruppen, sowie/und Cyclocarbonatharz-basierte Befestigungssysteme, deren Herstellung und Verwendung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4516028Y1 (da) * | 1965-08-30 | 1970-07-03 | ||
| JPS4628735Y1 (da) * | 1968-12-26 | 1971-10-05 |
-
1975
- 1975-03-17 IT IT21320/75A patent/IT1034323B/it active
-
1976
- 1976-03-09 ZA ZA761449A patent/ZA761449B/xx unknown
- 1976-03-12 GB GB10095/76A patent/GB1485925A/en not_active Expired
- 1976-03-15 CA CA247,964A patent/CA1076590A/en not_active Expired
- 1976-03-15 NO NO760900A patent/NO144263C/no unknown
- 1976-03-15 LU LU74557A patent/LU74557A1/xx unknown
- 1976-03-15 IE IE543/76A patent/IE43215B1/en unknown
- 1976-03-16 ES ES446341A patent/ES446341A1/es not_active Expired
- 1976-03-16 BE BE165201A patent/BE839609A/xx not_active IP Right Cessation
- 1976-03-16 CH CH327376A patent/CH620434A5/it not_active IP Right Cessation
- 1976-03-16 DK DK112576A patent/DK145300C/da not_active IP Right Cessation
- 1976-03-16 DE DE2611087A patent/DE2611087C3/de not_active Expired
- 1976-03-16 NL NLAANVRAGE7602749,A patent/NL171706C/xx not_active IP Right Cessation
- 1976-03-16 FR FR7607529A patent/FR2304609A1/fr active Granted
- 1976-03-17 SE SE7603360A patent/SE426944B/xx unknown
- 1976-03-17 JP JP51028208A patent/JPS51118763A/ja active Pending
Cited By (58)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841072A (en) * | 1981-12-02 | 1989-06-20 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US5023345A (en) * | 1981-12-02 | 1991-06-11 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US5138073A (en) * | 1981-12-02 | 1992-08-11 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| US4786741A (en) * | 1982-11-15 | 1988-11-22 | Scientific Design Company, Inc. | Preparation of alkylene carbonates |
| EP0119840A1 (en) * | 1983-03-18 | 1984-09-26 | BP Chemicals Limited | Preparation of carbonates |
| WO1984003701A1 (en) * | 1983-03-18 | 1984-09-27 | Bp Chem Int Ltd | Preparation of carbonates |
| EP0212409A2 (de) * | 1985-08-16 | 1987-03-04 | Hoechst Aktiengesellschaft | Verfahren zur Herstellung von 2-oxo-1,3-dioxolanen |
| EP0212409A3 (en) * | 1985-08-16 | 1987-10-21 | Hoechst Aktiengesellschaft | Process for the preparation of 2-oxo-1,3-dioxolanes |
| AU585385B2 (en) * | 1985-08-16 | 1989-06-15 | Hoechst Aktiengesellschaft | Process for the preparation of 2-oxo-1,3-dioxolanes |
| US5712363A (en) * | 1993-01-06 | 1998-01-27 | Akzo Nobel Nv | Oligomeric sterically hindered polyamine crosslinkers and coating compositions containing the same |
| US6077929A (en) * | 1996-10-09 | 2000-06-20 | Akzo Nobel N.V. | Internally blocked polyamine crosslinkers and coating compositions containing the same |
| CN107021488A (zh) * | 2016-02-01 | 2017-08-08 | 新绿科学股份有限公司 | 金属碳酸盐的制造方法以及该制造方法中所使用的催化剂 |
| WO2017186899A1 (en) | 2016-04-29 | 2017-11-02 | Henkel Ag & Co. Kgaa | Amine-functional polymers and methods for producing such polymers |
| WO2018206181A1 (en) | 2017-05-11 | 2018-11-15 | Henkel Ag & Co. Kgaa | Method for producing functionalized polyesters |
| EP3401348A1 (en) | 2017-05-11 | 2018-11-14 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| EP3409707A1 (en) | 2017-05-30 | 2018-12-05 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| WO2018219574A1 (en) | 2017-05-30 | 2018-12-06 | Henkel Ag & Co. Kgaa | Method for producing functionalized polyesters |
| EP3428216A1 (en) | 2017-07-11 | 2019-01-16 | Henkel AG & Co. KGaA | Method for producing functionalized polyesters |
| WO2019011510A1 (en) | 2017-07-11 | 2019-01-17 | Henkel Ag & Co. Kgaa | PROCESS FOR PRODUCING FUNCTIONALIZED POLYESTERS |
| US11866547B2 (en) | 2017-07-11 | 2024-01-09 | Henkel Ag & Co. Kgaa | Method for producing functionalized polyesters |
| US11883803B2 (en) | 2018-06-19 | 2024-01-30 | Henkel Ag & Co. Kgaa | Highly active double metal cyanide compounds |
| WO2019243067A1 (en) | 2018-06-19 | 2019-12-26 | Henkel Ag & Co. Kgaa | Highly active double metal cyanide compounds |
| EP3725820A1 (en) | 2019-04-16 | 2020-10-21 | Henkel AG & Co. KGaA | Use of functionalized alpha-angelica lactones |
| US11697643B2 (en) | 2019-04-16 | 2023-07-11 | Henkel Ag & Co. Kgaa | Use of functionalized alpha-angelica lactones |
| WO2020212149A1 (en) | 2019-04-16 | 2020-10-22 | Henkel Ag & Co. Kgaa | Use of functionalized alpha-angelica lactones |
| WO2021004624A1 (en) | 2019-07-09 | 2021-01-14 | Henkel Ag & Co. Kgaa | Two component (2k) composition based on modified epoxy resins |
| EP3798246A1 (en) | 2019-09-27 | 2021-03-31 | Henkel AG & Co. KGaA | One component (1k) composition based on modified epoxy resin |
| WO2021058509A1 (en) | 2019-09-27 | 2021-04-01 | Henkel Ag & Co. Kgaa | One component (1k) composition based on modified epoxy resin |
| WO2021110635A1 (en) | 2019-12-04 | 2021-06-10 | Henkel Ag & Co. Kgaa | One component (1k) composition based on epoxy resin |
| EP3831863A1 (en) | 2019-12-04 | 2021-06-09 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| EP3831862A1 (en) | 2019-12-04 | 2021-06-09 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| WO2021110634A1 (en) | 2019-12-04 | 2021-06-10 | Henkel Ag & Co. Kgaa | One component (1k) composition based on epoxy resin |
| WO2021115771A1 (en) | 2019-12-13 | 2021-06-17 | Henkel Ag & Co. Kgaa | One component (1k) curable adhesive composition |
| EP3835381A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| WO2021115773A1 (en) | 2019-12-13 | 2021-06-17 | Henkel Ag & Co. Kgaa | Two component (2k) curable adhesive composition |
| WO2021115772A1 (en) | 2019-12-13 | 2021-06-17 | Henkel Ag & Co. Kgaa | Two component (2k) curable adhesive composition |
| WO2021115774A1 (en) | 2019-12-13 | 2021-06-17 | Henkel Ag & Co. Kgaa | Two component (2k) curable adhesive composition |
| EP3835378A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| EP3835386A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | Two component (2k) curable adhesive composition |
| EP3835383A1 (en) | 2019-12-13 | 2021-06-16 | Henkel AG & Co. KGaA | One component (1k) curable adhesive composition |
| EP3916033A1 (en) | 2020-05-28 | 2021-12-01 | Henkel AG & Co. KGaA | One component (1k) composition based on epoxy resin |
| WO2021239686A1 (en) | 2020-05-28 | 2021-12-02 | Henkel Ag & Co. Kgaa | One component (1k) composition based on epoxy resin |
| EP3943564A1 (en) | 2020-07-21 | 2022-01-26 | Henkel AG & Co. KGaA | Room temperature stable, electrically conductive 1k epoxy formulation |
| WO2022017815A1 (en) | 2020-07-21 | 2022-01-27 | Henkel Ag & Co. Kgaa | Room temperature stable, electrically conductive 1k epoxy formulation |
| WO2022043160A1 (en) | 2020-08-27 | 2022-03-03 | Henkel Ag & Co. Kgaa | Electrically conductive one component (1k) epoxy formulation |
| WO2022081271A1 (en) | 2020-10-13 | 2022-04-21 | Cabot Corporation | Conductive photo-curable compositions for additive manufacturing |
| WO2022135997A1 (en) | 2020-12-21 | 2022-06-30 | Henkel Ag & Co. Kgaa | Two component (2k) epoxy formulation |
| EP4015557A1 (en) | 2020-12-21 | 2022-06-22 | Henkel AG & Co. KGaA | Two component (2k) epoxy formulation |
| EP4050060A1 (en) | 2021-02-26 | 2022-08-31 | Henkel AG & Co. KGaA | A photocurable adhesive or sealant composition |
| EP4050061A1 (en) | 2021-02-26 | 2022-08-31 | Henkel AG & Co. KGaA | Near-infrared (nir) sensitized adhesive and sealant compositions |
| WO2022179826A1 (en) | 2021-02-26 | 2022-09-01 | Henkel Ag & Co. Kgaa | A photocurable adhesive or sealant composition |
| WO2022179827A1 (en) | 2021-02-26 | 2022-09-01 | Henkel Ag & Co. Kgaa | Near-infrared (nir) sensitized adhesive and sealant compositions |
| EP4159784A1 (en) | 2021-09-30 | 2023-04-05 | Henkel AG & Co. KGaA | Two component (2k) composition based on epoxy (meth)acrylate resin |
| WO2023052002A1 (en) | 2021-09-30 | 2023-04-06 | Henkel Ag & Co. Kgaa | Two component (2k) composition based on epoxy (meth)acrylate resin |
| WO2023241875A1 (en) | 2022-06-17 | 2023-12-21 | Henkel Ag & Co. Kgaa | Two component (2k) curable adhesive composition |
| EP4332144A1 (en) | 2022-09-05 | 2024-03-06 | Henkel AG & Co. KGaA | One component (1k) curable adhesive composition |
| WO2024052060A1 (en) | 2022-09-05 | 2024-03-14 | Henkel Ag & Co. Kgaa | One component (1k) curable adhesive composition |
| WO2024078879A1 (en) | 2022-10-12 | 2024-04-18 | Henkel Ag & Co. Kgaa | Two component (2k) epoxy formulation |
Also Published As
| Publication number | Publication date |
|---|---|
| DK145300B (da) | 1982-10-25 |
| DK145300C (da) | 1983-03-21 |
| IT1034323B (it) | 1979-09-10 |
| FR2304609A1 (fr) | 1976-10-15 |
| NL171706C (nl) | 1983-05-02 |
| ES446341A1 (es) | 1977-06-16 |
| FR2304609B1 (da) | 1978-10-13 |
| SE426944B (sv) | 1983-02-21 |
| DE2611087B2 (de) | 1978-11-09 |
| DE2611087C3 (de) | 1979-07-05 |
| JPS51118763A (en) | 1976-10-18 |
| NO760900L (da) | 1976-09-20 |
| ZA761449B (en) | 1977-03-30 |
| IE43215L (en) | 1976-09-17 |
| DE2611087A1 (de) | 1976-09-23 |
| DK112576A (da) | 1976-09-18 |
| NO144263C (no) | 1981-07-29 |
| IE43215B1 (en) | 1981-01-14 |
| NL171706B (nl) | 1982-12-01 |
| BE839609A (fr) | 1976-09-16 |
| NL7602749A (nl) | 1976-09-21 |
| CA1076590A (en) | 1980-04-29 |
| CH620434A5 (en) | 1980-11-28 |
| LU74557A1 (da) | 1976-09-01 |
| AU1194376A (en) | 1977-09-15 |
| NO144263B (no) | 1981-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1485925A (en) | Production of alkylene carbonates | |
| JPS5236683A (en) | Production of riphamycin | |
| JPS5212162A (en) | Production of phenylindoline | |
| JPS51141897A (en) | Production of riphamycin | |
| JPS5251392A (en) | Production of triazolopyridazinones | |
| JPS51131873A (en) | Production of 44loneralkyll 55cyanoooxazole | |
| GB1538122A (en) | Production of alkylene glycols | |
| JPS525762A (en) | Production of betaa acylpyrol | |
| JPS5248698A (en) | Production of riphamycin | |
| JPS51130543A (en) | Production of instant onigiri | |
| IL51013A (en) | Production of ethyl chloro-thioformate | |
| JPS5289667A (en) | Production of nnsubstituted spirolaltam | |
| JPS51115473A (en) | Production of lower alkylimidazolecarboxylate | |
| JPS5227758A (en) | Production of 22methyll 11naphthol | |
| JPS5219695A (en) | Production of tetrahydrothiopyranopyrazols | |
| JPS5248689A (en) | Production of pyrazolopyridineketones | |
| JPS51115465A (en) | Production of 55phenyll 22framidoxime | |
| JPS51146498A (en) | Production of carbamate of 22haloergorine or 22haloergorene | |
| JPS5248662A (en) | Production of 44hydroxymethyll 22pyrorysines | |
| JPS5273858A (en) | Production of phospholenee 11calcogenite | |
| JPS5236690A (en) | Production of 33methoxymethlcephalosporin | |
| JPS5246100A (en) | Production of pyrazolopyridopirimidine | |
| GB1544683A (en) | Manufacture of 5-cyanopyrid-6-ones | |
| JPS5212991A (en) | Production of bioprotein | |
| JPS51128997A (en) | Production of pyrazolopyridineketones |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19960311 |