US3275709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-drying polyester resins prepared from tetrahydrophthalic anhydride and tricarboxylic acids
Assignee: Honeywell International Inc
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Filing: 1962-04-27
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Granted: 1966-09-27
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 George S Wooster
- 👤 Berger S Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:21
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A POLYMERIZABLE UNSATURATED POLYESTER WHICH COMPRISES THE ESTERIFICATION PRODUCT OF: (A) TETRAHYDROPHTHALIC ACID ANHYDRIDE; (B) FUMARIC ACID; (C) DIETHYLENE GLYCOL, AND; (D) MALIC ACID, SAID TETRAHYDROPHTHALIC ACID ANHYDRIDE PROVIDING FROM ABOUT 40 TO ABOUT 55 EQUIVALENTS PER 100 EQUIVALENTS OF THE CARBOXYLIC GROUPS PRESENT, SAID MALIC ACID PROVIDING ABOUT 10 EQUIVALENTS PER 100 EQUIVALENTS OF THE CARBOXYLIC GROUPS PRESENT.
Claim 2
Dependent Claim
59 words
A POLYMERIZATION UNSATURATED POLYESTER WHICH COMPRISES THE ESTERIFICATION PRODUCT OF: (A) TETRAHYDROPHTHALIC ACID ANHYDRIDE; (B) FUMARIC ACID; (C) DIETHYLENE GLYCOL, AND; (D) TRIS (2-CARBOXYETHYL)ISOCYANURATE, SAID TETRAHYDROPHTHALIC ACID ANHYDRIDE PROVIDING FROM ABOUT 40 TO ABOUT 55 EQUIVALENTS PER 100 EQUIVALENTS OF THE CARBOXYLIC GROUPS PRESENT, SAID TRIS (2-CARBOXYETHYL)ISOCYANURATE PROVIDING ABOUT 10 EQUIVALENTS PER 100 EQUIVALENTS OF THE CARBOXYLIC GROUPS PRESENT.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |