US2510783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl fluoride polymerization process
Assignee: EIDP Inc
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Filing: 1946-12-18
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Granted: 1950-06-06
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Expires: 1966-12-18
Abstract
No abstract record available.
Inventors
- 👤 Johnston Frederick Lewis
- 👤 Pease Donald Cargill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:27
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
PROCESS OF PREPARING TOUGH, ORIENTABLE POLYVINYL FLUORIDE COMPRISING SUBJECTING TO A TEMPERATURE OF 25*C.-100*C. AND A PRESSURE OF 25-100 ATMOSPHERES A MIXTURE OF MONOMERIC VINYL FLUORIDE AS THE SOLE POLYMERIZABLE COMPONENT AND A LIQUID POLYMERIZATION MEDIUM IN THE PRESENCE OF 0.01%-3%, BY WEIGHT OF SAID VINYL FLUORIDE, OF AN ORGANIC AZO COMPOUND WHEREIN THE AZO, -N=N-, GROUP IS BONDED FROM BOTH ITS NITROGENS TO TERTIARY CARBONS OF THE CLASS CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC CARBONS, IN DISCRETE RADICALS, SAID TERTIARY CARBONS BEING FURTHER BONDED TO A MEMBER FROM THE GROUP CONSISTING OF CYANO, CARBONAMIDE, AND CARBALKOXY, CONTAINED IN SAID DISCRETE RADICALS, AND SAID RADICALS BEING FREE FROM OPEN CHAIN CARBON TO CARBON UNSATURATION AND BEING HYDROCARBON EXCEPT FOR SAID CYANO, CARBONAMIDE, AND CARBALKOXY GROUPS.
Claim 2
Dependent Claim
124 words
PROCESS OF PREPARING TOUGH, ORIENTABLE POLYVINYL FLUORIDE COMPRISING SUBJECTING TO A TEMPERATURE OF 25*C.-100*C. AND A PRESSURE OF 25-100 ATMOSPHERES A MIXTURE OF MONOMERIC VINYL FLUORIDE AS THE SOLE POLYMERIZABLE COMPONENT AND A LIQUID POLYMERIZATION MEDIUM IN THE PRESENCE OF 0.01%-3%, BY WEIGHT OF SAID VINYL FLUORIDE, OF AN ORGANIC AZO COMPOUND WHEREIN THE AZO, -N=N-, GROUP IS BONDED FROM BOTH ITS NITROGENS TO TERTIARY CARBONS OF THE CLASS CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC CARBONS, IN DISCRETE RADICALS, SAID TERTIARY CARBONS BEING FURTHER BONDED TO A MEMBER FROM THE GROUP CONSISTING OF CYANO, CARBONAMIDE, AND CARBALKOXY, CONTAINED IN SAID DISCRETE RADICALS, AND SAID RADICALS BEING FREE FROM OPEN CHAIN CARBON TO CARBON UNSATURATION AND BEING HYDROCARBON EXCEPT FOR SAID CYANO, CARBONAMIDE, AND CARBALKOXY GROUPS.
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |