US3708463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vinylidene fluoride polymers for coating applications
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1971-03-18
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Granted: 1973-01-02
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Expires: 1991-03-18
Abstract
Abstract VINYLIDENE FLUORIDE POLYMERS HAVING PARTICULAR UTILITY FOR DISPERSION COATING APPLICATION ARE PREPARED IN AN AQUEOUS MEDIUM IN THE PRESENCE OF A FLUORINATED SURFACTANT, A LOWER ALKYLENE OXIDE, AND, AS THE FREE-RADICAL INITIATOR, B-HYDROXYETHYL TERTIARY BUTYL PEROXIDE, WHILE A PRESSURE OF AT LEAST 1500 P.S.I.G. IS MAINTAINED ON THE REACTION BY CONTINUOUSLY APPLYING HYDROSTATIC PRESSURE, SUBSTANTIAL YIELDS, I.E., AT LEAST 85% CONVERSION, OF POLYMER PRODUCT ARE PRODUCED IN POLYMERIZATION RUN TIMES OF 0.5 HOUR TO ABOUT 6 HOURS WITH MINIMUM REACTOR FOULING.
Inventors
- 👤 J Stallings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/18; C08F114/22
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |