Patent US2944995A successfully refreshed from Google Patents.
US2944995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration of the peroxide cure of hexafluoropropylene-vinylidene fluoride elastomer with methylene bisacrylamide
Assignee: Uniroyal Inc
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Filing: 1959-05-15
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Granted: 1960-07-12
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Expires: 1979-05-15
Abstract
No abstract record available.
Inventors
- 👤 Lucian P Dosmann
- 👤 Gerald L Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF CURING A SATURATED FLUOROCARBON ELASTOMER, WHICH IS A COPOLYMER OF 20% TO 70% OF HEXAFLUOROPROPYLENE AND CORRESPONDINGLY 80 TO 30% OF VINYLIDNE FLUORIDE, COMPRISING MIXING 100 PARTS OF SAID ELASTOMER WITH FROM 1 TO 5 PARTS OF A PEROXIDE CURING AGENT, THE SAID PEROXIDE BEING STABLE AT TEMPERATURES BELOW 50* C., AND FROM 4 TO 22 PARTS OF N,N''-METHYLENEBISACRYLAMIDE AS AN ACCELERATOR, AT A TEMPERATURE OF FROM 150* TO 350*F. FOR A PERIOD OF FROM 5 MINUTES TO 24 HOURS, THE SAID PARTS AND PERCENTAGES BEING BY WEIGHT.
Claim 2
Independent Claim
91 words
A METHOD OF CURING A SATURATED FLUOROCARBON ELASTOMER, WHICH IS A COPOLYMER OF 20% TO 70% OF HEXAFLUOROPROPYLENE AND CORRESPONDINGLY 80 TO 30% OF VINYLIDNE FLUORIDE, COMPRISING MIXING 100 PARTS OF SAID ELASTOMER WITH FROM 1 TO 5 PARTS OF A PEROXIDE CURING AGENT, THE SAID PEROXIDE BEING STABLE AT TEMPERATURES BELOW 50* C., AND FROM 4 TO 22 PARTS OF N,N''-METHYLENEBISACRYLAMIDE AS AN ACCELERATOR, AT A TEMPERATURE OF FROM 150* TO 350*F. FOR A PERIOD OF FROM 5 MINUTES TO 24 HOURS, THE SAID PARTS AND PERCENTAGES BEING BY WEIGHT.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |