US3661863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copoly(amide-imide)s comprising the reaction product of a diacid,a triacid and bis(4-aminocyclohexyl)methane
Assignee: Phillips Petroleum Co
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Filing: 1970-06-11
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Granted: 1972-05-09
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Expires: 1990-06-11
Abstract
Abstract COPOLY(AMIDE-IMIDE)S ARE OBTAINED BY USING A COMBINATION OF BOTH A DICARBOXYLIC ACID AND TRICARBOXYLIC ACID AND POLYMERIZATION WITH PACM.
Inventors
- 👤 Robert W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |