Patent US2967840A successfully refreshed from Google Patents.
US2967840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters of 4, 5-epoxycyclohexane-1, 2-dicarboxylic acids
Assignee: Union Carbide Corp
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Filing: 1956-12-27
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Granted: 1961-01-10
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Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Phillips Benjamin
- 👤 Paul S Starcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN OXIRANE OXYGEN-CONTAINING POLYESTER OF 4-CYCLOHEXENE-1,2-DICARBOXYLIC ACID, PROPYLENE GLYCOL AND OLEIC ACID WHEREIN AN OXIRANE OXYGEN IS ATTACHED TO THE 4,5-RING POSITIONS OF THE CYCLOHEXANE-1,2-DICARBONYL GROUPS OF SAID POLYESTER.
Claim 2
Dependent Claim
29 words
AN OXIRANE OXYGEN-CONTAINING POLYESTER OF 4-CYCLOHEXENE-1,2-DICARBOXYLIC ACID, PROPYLENE GLYCOL AND OLEIC ACID WHEREIN AN OXIRANE OXYGEN IS ATTACHED TO THE 4,5-RING POSITIONS OF THE CYCLOHEXANE-1,2-DICARBONYL GROUPS OF SAID POLYESTER.
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |