US2759901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial esters of epoxide resins
Assignee: Celanese Coatings Co
•
Filing: 1952-09-19
•
Granted: 1956-08-21
•
Expires: 1972-09-19
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; Y; Y10; Y10S; Y10S525/00; Y10S525/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF PRODUCING EPOXY RESIN ESTERS CONTAINING BOTH EPOXIDE AND ESTER GROUPS ADMIXED WITH UNESTERIFIED EPOXY RESINS WHICH COMPRISES SUBJECTING EPOXIDE RESINS, WHICH ARE POLYETHER DERIVATIVES OF DIHYDRIC PHENOLS HAVING ALTERNATING ALIPHATIC GROUPS AND AROMATIC NECLEI UNITED THROUGH ETHER OXYGEN AND HAVING TERMINAL EPOXIDE GROUPS, TO ESTERIFICATION WITH AN AMOUNT OF A MONOBASIC CARBOXYLIC ACID SUBSTANTIALLY LESS THAN HALF THAT CORRESPONDING TO THE EPOXIDE GROUPS OF THE RESIN AND LESS THAN 10% OF THAT REQUIRED FOR COMPLETE ESTERIFICATION OF THE EPOXIDE AND HYDROXYL GROUPS OF THE RESIN.
Claim 2
Independent Claim
88 words
THE METHOD OF PRODUCING EPOXY RESIN ESTERS CONTAINING BOTH EPOXIDE AND ESTER GROUPS ADMIXED WITH UNESTERIFIED EPOXY RESINS WHICH COMPRISES SUBJECTING EPOXIDE RESINS, WHICH ARE POLYETHER DERIVATIVES OF DIHYDRIC PHENOLS HAVING ALTERNATING ALIPHATIC GROUPS AND AROMATIC NECLEI UNITED THROUGH ETHER OXYGEN AND HAVING TERMINAL EPOXIDE GROUPS, TO ESTERIFICATION WITH AN AMOUNT OF A MONOBASIC CARBOXYLIC ACID SUBSTANTIALLY LESS THAN HALF THAT CORRESPONDING TO THE EPOXIDE GROUPS OF THE RESIN AND LESS THAN 10% OF THAT REQUIRED FOR COMPLETE ESTERIFICATION OF THE EPOXIDE AND HYDROXYL GROUPS OF THE RESIN.
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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |