US3264267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-carboxy polyesters and method of making them
Assignee: Standard Oil Co
•
Filing: 1962-09-10
•
Granted: 1966-08-02
•
Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 James R Stephens
- 👤 Richard E Van Strien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/16; C08G63/20; C08G63/40; C08G63/42; C08G63/56; C08G63/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD FOR PREPARING RESINOUS LINEAR 4-CARBOXY POLYESTERS WHICH COMPRISES: (A) REACTION AT A TEMPERATURE BELOW 70*C. 4-VINYL TRIMELLITATE ANHYDRIDE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF A MONO-EPOXIDE AND A MIXTURE OF A MONO-EPOXIDE WITH A GLYCOL, SAID EPOXIDE AND GLYCOL EACH HAVING FROM 2 TO 9 CARBON ATOMS, TO OBTAIN A RESINOUS LINEAR POLYESTER HAVING THE REPEATING UNIT
Claim 2
Independent Claim
62 words
A METHOD FOR PREPARING RESINOUS LINEAR 4-CARBOXY POLYESTERS WHICH COMPRISES: (A) REACTION AT A TEMPERATURE BELOW 70*C. 4-VINYL TRIMELLITATE ANHYDRIDE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF A MONO-EPOXIDE AND A MIXTURE OF A MONO-EPOXIDE WITH A GLYCOL, SAID EPOXIDE AND GLYCOL EACH HAVING FROM 2 TO 9 CARBON ATOMS, TO OBTAIN A RESINOUS LINEAR POLYESTER HAVING THE REPEATING UNIT
References Cited (Backward Citations)
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |