Patent DE1125076B successfully refreshed from Google Patents.
US3759868A
Expired / Lapsed
US
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Carboxynitroso polybutadiene vulcanizate
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1970-12-28
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Granted: 1973-09-18
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Expires: 1990-12-28
Abstract
Abstract A DECREASE IN PERMEABILITY AND AN INCREASE IN RESISTANCE OF CARBOXYNITROSO RUBBERS CAN BE EFFECTED BY THE ADDITION OF SMALL AMOUNTS OF POLYBUTADIENE RESINS. LIQUID FUNCTIONALLY TERMINATED POLYBUTADIENE IS MIXED INTO A TERPOLYMER CONTAINING TRIFLUOROITROSOMETHANE, TETRAFLUOROETHYLENE, AND A SMALL AMOUNT OF NITROSOPERFLUOROBUTYRIC ACID. THE MIXTURE IS CURED IN THE PRESENCE OF A PEROXIDE FREE RADICAL INITIATOR.
Inventors
- 👤 R Meyers
- 👤 E Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08C; C08C19/00; C08G73/00; C08G73/24; C08G73/26
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |