Patent US3344129A successfully refreshed from Google Patents.
US3344129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of hydrolyzing vinyl ester-ethylene copolymers
Assignee: Hoechst AG
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Filing: 1964-05-26
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Granted: 1967-09-26
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Expires: 1984-05-26
Abstract
No abstract record available.
Inventors
- 👤 Bestian Herbert
- 👤 Korbanka Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:02
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; C08F16/00; C08F16/02; C08F16/04; C08F16/06; C08F210/00; C08F210/02; C08F216/00; C08F216/02; C08F216/04; C08F216/06; C08F8/00; C08F8/12; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6212; C09; C09D; C09D129/00; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR PREPARING AT LEAST PARTIALLY HYDROLYZED COPOLYMERS OF VINYL ACETATE AND ETHYLENE WHICH COMPRISES HEATING A COPOLYMER OF VINYL ACETATE AND ETHYLENE HAVING A MOLECULAR PROPORTION OF VINYL ACETATE TO ETHYLENE OF LOWER THAN 1:5, IN THE PRESENCE OF 0.01-10 PERCENT BY WEIGHT, CALCULATED ON THE COPOLYMER, OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING AN ACID REACTION AND A COMPOUND HAVING AN ALKALINE REACTION IN AQUEOUS SOLUTION WITH A PRIMARY ALCOHOL HAVING 4-10 CARBON ATOMS AND SIMULTANEOUSLY DISTILLING OFF THE FORMED ESTER OF THE PRIMARY ALCOHOL FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
97 words
A PROCESS FOR PREPARING AT LEAST PARTIALLY HYDROLYZED COPOLYMERS OF VINYL ACETATE AND ETHYLENE WHICH COMPRISES HEATING A COPOLYMER OF VINYL ACETATE AND ETHYLENE HAVING A MOLECULAR PROPORTION OF VINYL ACETATE TO ETHYLENE OF LOWER THAN 1:5, IN THE PRESENCE OF 0.01-10 PERCENT BY WEIGHT, CALCULATED ON THE COPOLYMER, OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING AN ACID REACTION AND A COMPOUND HAVING AN ALKALINE REACTION IN AQUEOUS SOLUTION WITH A PRIMARY ALCOHOL HAVING 4-10 CARBON ATOMS AND SIMULTANEOUSLY DISTILLING OFF THE FORMED ESTER OF THE PRIMARY ALCOHOL FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |