US3637576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epdm rubber insulating composition
Assignee: United States Department of the Navy
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Filing: 1970-04-22
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Granted: 1972-01-25
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Expires: 1990-04-22
Abstract
Abstract AN INSULATING COMPOSITION FOR THE INSIDE OF ROCKET MOTORS COMPRISING (1) A RUBBER COMPRISING ETHYLENE, PROPYLENE AND A DIENE SELECTED FROM THE GROUP CONSISTING OF METHYLYLIDENE NORBORNENE AND ETHYLIDENE NORBORNENE, (2) CARBON OR SILICA (3) ASBESTOS (4) ZINC OXIDE AND (5) BROMOMETHYL ALKYLATED PHENOLFORMALDEHYDE RESIN.
Inventors
- 👤 Gordon Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:37
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08L61/00; C08L61/04; C08L61/06; C08L2312/00; C08L2312/04
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |