US3663651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal-resistant polyimide-epoxy polymers
Assignee: Rogers Corp
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Filing: 1970-09-03
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Granted: 1972-05-16
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Expires: 1990-09-03
Abstract
Abstract CROSS-LINKED, POLYIMIDE-EPOXY POLYMERS ARE PREPARED BY REACTING POLYAMIDE-ACIDS, DERIVED FROM THE REACTION OF AN EXCESS OF AN ORGANIC, DIANHYDRIDE WITH AN ORGANIC DIAMINE WITH EPOXY COMPOUNDS, FOLLOWED BY CURING THE RESULTANT REACTION PRODUCT, USUALLY BY HEATING, TO GIVE THE POLYIMIDE-EPOXY POLYMERS.
Inventors
- 👤 George Robert Traut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:45
CPC Classifications
C; C08; C08L; C08L63/00; C08L79/00; C08L79/04; C08L79/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31681
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |