US3557034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing system for fluorocarbon elastomers
Assignee: NAT RES DEV
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Filing: 1966-11-25
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Granted: 1971-01-19
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Expires: 1986-11-25
Abstract
Abstract FLUOROCARBON ELASTOMERS ARE CURED BY HEATING IN THE PRESENCE OF TRIETHYLENETETRAMINE, PREFERABLY IN THE PRESENCE OF P-PHENYLENE DIAMINE AS A CURING AGENT. THE ELASTOMER CAN BE PLASTICIZED, PREFERABLY WITH SULPHUR PENTAFLUOROCHLORIDE TETRAFLUOROETHYLENE TELOMER OR A GLYCOL.
Inventors
- 👤 David Kenneth Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:20
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |