US3816561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester compositions from transpiperylene-maleic acid adducts and hydrogenated bisphenol a
Assignee: Velsicol Chemical LLC
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Filing: 1972-03-13
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Granted: 1974-06-11
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Expires: 1992-03-13
Abstract
Abstract THIS INVENTION DISCLOSES A LINEAR POLYESTER COMPRISING FROM ABOUT 10 TO ABOUT 40 MOLE PERCENT OF AN ADDUCT OF TRANS-PIPERYLENE AND MALEIC ACID OR ITS ANHYDRIDE; FROM ABOUT 10 TO ABOUT 40 MOLE PERCENT OF DICARBOXYLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, FUMARIC ACID, AND MIXTURES THEREOF; AND FROM ABOUT 50 TO 70 MOLE PERCENT GLYCOL WHEREIN ABOUT 10 TO 100 MOLE PERCENT OF SAID GLYCOL IS HYDROGENATED BISPENOL A.
Inventors
- 👤 T Hokama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |