US3576786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-aziridine polymer product
Assignee: National Aeronautics and Space Administration
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Filing: 1968-09-27
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Granted: 1971-04-27
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Expires: 1988-09-27
Abstract
Abstract A POLYMERIC PRODUCT RESULTING FROM THE REACTION OF POLYFUNCTIONAL EPOXY RESINS WITH POLYFUNCTIONAL AZIRIDINE COMPOUNDS.
Inventors
- 👤 Sarkis H Kalfayan
- 👤 Barbara A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/506; C08G59/5066
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |