US3792022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro addition polymers
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1972-10-27
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Granted: 1974-02-12
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Expires: 1992-10-27
Abstract
Abstract HIGHLY STABLE STRUCTURAL POLYMERS ARE MADE BY REACTING A PERFLUORO VINYL CONTAINING REACTANT WITH DIFLUOROMALEIC ANHYDRIDE IN THE PESENCE OF A CATALYST. THESE LINEAR PERFLUORO POLYMERS MAY BE MODIFIED BY INCLUDING IN THE BACKBONE CHAIN A PERFLUORO COMPOUND HAVING A PENDANT OXY STRUCTURE. FURTHER MODIFICATION MAY BE OBTAINED BY INCLUDIDNG AMINE TERMINATED OR DISOCYANATE TERMINATED PERFLUORO CROSS-LINKING COMPOUNDS. POLYMERIZATION BY SIMPLE ADDITION REACTION IS MADE TO OCCUR BY THE APPLICATION OF PEROXIDE CATALYST. THESE LINEAR PERFLUORO POLYMERS MAY BE USED FOR APPLICATIONS AS SEALS, SEALANTS, FILMS, COATINGS, AND FIBERS.
Inventors
- 👤 R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/773; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/24; C08F214/00; C08F214/18; C08F214/26; C08F8/00; C08G18/28; C08G18/40; C08G18/62; C08G18/6275; C08G18/6279
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |