US2941987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of curing rubbery fluoroelastomers
Assignee: Uniroyal Inc
•
Filing: 1958-03-19
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Granted: 1960-06-21
•
Expires: 1978-03-19
Abstract
No abstract record available.
Inventors
- 👤 Dewey Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF CURING A FLUOROELASTOMER SELECTED FROM THE GROUP CONSISTING OF RUBBERY COPOLYMERS OF VINYLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE AND RUBBERY COPOLYMERS OF VINYLIDENE FLUORIDE AND MONOCHLOROTRIFLUOROETHYLENE IN THE PRESENCE OF AN AMINE CURING AGENT COMPRISING SUBJECTING SAID FLUOROELASTOMER UNDER POSITIVE PRESSURE IN EXCESS OF ONE ATMOSPHERE TO AN AIR-AMONIA ATMOSPHERE AT A TEMPERATURE OF FROM 150* TO 350* F., SAID AMMONIA BEING AT LEAST FOUR PERCENT BY VOLUME OF SAID ATMOSPHERE.
Claim 2
Independent Claim
72 words
A METHOD OF CURING A FLUOROELASTOMER SELECTED FROM THE GROUP CONSISTING OF RUBBERY COPOLYMERS OF VINYLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE AND RUBBERY COPOLYMERS OF VINYLIDENE FLUORIDE AND MONOCHLOROTRIFLUOROETHYLENE IN THE PRESENCE OF AN AMINE CURING AGENT COMPRISING SUBJECTING SAID FLUOROELASTOMER UNDER POSITIVE PRESSURE IN EXCESS OF ONE ATMOSPHERE TO AN AIR-AMONIA ATMOSPHERE AT A TEMPERATURE OF FROM 150* TO 350* F., SAID AMMONIA BEING AT LEAST FOUR PERCENT BY VOLUME OF SAID ATMOSPHERE.
References Cited (Backward Citations)
US2304637A
Cited
US2793200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |