US3345338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes prepared from amino polyesters
Assignee: Bayer AG
•
Filing: 1963-08-09
•
Granted: 1967-10-03
•
Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4615; C08G18/4669; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A POLYURETHANE COMPOSITION PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN AMINO ESTER, SAID AMINO ESTER HAVING BEEN PREPARED BY ADDITION OF A PRIMARY OR SECONDARY AMINE AT THE POINT OF A,B-UNSATURATION OF A POLYESTER HAVING A HYDROXYL NUMBER FROM ABOUT 30 TO 1200, SAID POLYESTER HAVING BEEN PREPARED BY A PROCESS WHICH COMPRISES REACTING AN A,BUNSATURATED CARBOXYLIC ACID, AN ESTER OF AN A,B-UNSATURATED CARBOXYLIC ACID OR AN ANHYDRIDE OF AN A,B-UNSATURATED CARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL.
Claim 2
Dependent Claim
82 words
A POLYURETHANE COMPOSITION PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH AN AMINO ESTER, SAID AMINO ESTER HAVING BEEN PREPARED BY ADDITION OF A PRIMARY OR SECONDARY AMINE AT THE POINT OF A,B-UNSATURATION OF A POLYESTER HAVING A HYDROXYL NUMBER FROM ABOUT 30 TO 1200, SAID POLYESTER HAVING BEEN PREPARED BY A PROCESS WHICH COMPRISES REACTING AN A,BUNSATURATED CARBOXYLIC ACID, AN ESTER OF AN A,B-UNSATURATED CARBOXYLIC ACID OR AN ANHYDRIDE OF AN A,B-UNSATURATED CARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |