Patent US2955104A successfully refreshed from Google Patents.
US2955104A
Expired / Lapsed
US
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Process for curing fluoroelastomers
Assignee: EIDP Inc
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Filing: 1958-09-17
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Granted: 1960-10-04
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Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 John F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/76; C07D277/80; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K5/44; C08K5/45; C08K5/46; C08K5/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS OF CURING A FLUOROELASTOMER PREPARED BY COPOLYMERIZING 30 TO 70% BY WEIGHT OF VINYLIDENE FLUORIDE WITH 70 TO 30% BY WEIGHT OF HEXAFLUOROPROPENE, SAID PROCESS COMPRISING THE STEPS OF (1) COMPOUNDING SAID ELASTOMER WITH FROM 2 TO 5%, BY WEIGHT, OF A SULFENAMIDE HAVING THE STRUCTURE
Claim 2
Dependent Claim
48 words
A PROCESS OF CURING A FLUOROELASTOMER PREPARED BY COPOLYMERIZING 30 TO 70% BY WEIGHT OF VINYLIDENE FLUORIDE WITH 70 TO 30% BY WEIGHT OF HEXAFLUOROPROPENE, SAID PROCESS COMPRISING THE STEPS OF (1) COMPOUNDING SAID ELASTOMER WITH FROM 2 TO 5%, BY WEIGHT, OF A SULFENAMIDE HAVING THE STRUCTURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |