Patent US3779996A successfully refreshed from Google Patents.
US3779996A
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Polyamideimides from unsaturated anhydrides
Assignee: General Electric Co
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Filing: 1972-09-11
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Granted: 1973-12-18
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Expires: 1992-09-11
Abstract
Abstract THE PROPERTIES OF UNSATURATED ANHYDRIDE CHAIN-BLOCKED POLYAMIDEIMIDES CONTAINING FREE CARBOXYL AND AMINE GROUPS ARE IMPROVED BY REACTING WITH THE UNCURED MATERIAL POLYISOCYANATE.
Inventors
- 👤 D Pauze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:16
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/14; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/6755; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 0
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |