US3640959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cured polyferrocenylenes and process for curing
Assignee: United States Department of the Air Force
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Filing: 1969-03-06
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Granted: 1972-02-08
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Expires: 1989-03-06
Abstract
Abstract CURED POLYFERROCENYLENES AND THE PROCESS FOR CURING THEM ARE DISCLOSED. LOW MOLECULAR WEIGHT THERMOPLASTIC POLYFERROCENYLENES ARE REACTED WITH AROMATIC DICARBOXALDEHYDES. THE RESULTING COPOLYMERS CROSS-LINK AND CURE TO HARD, HEAT-RESISTANT, RADIATION-RESISTANT STRUCTURES UPON TREATMENT WITH HEAT AND PRESSURE.
Inventors
- 👤 Norman Bilow
- 👤 Harold Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:52
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/0287
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |