US3640985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of fluorine-containing ethylenically unsaturated monomers in the presence of a beta-hydroxyalkyl tertiary-butyl peroxide
Assignee: PPG Industries Inc
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Filing: 1969-05-16
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Granted: 1972-02-08
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Expires: 1989-05-16
Abstract
Abstract FLUORIN-CONTAINING ETHYLENICALLY UNSATURATED MONOMERS, E.G., VINYLIDENE FLUORIDE, ARE POLYMERIZED IN AN AQUEOUS MEDIUM WITH AN INITIATING AMOUNT OF BETA-HYDROXYALKYL TERTIARY BUTYL PEROXIDE.
Inventors
- 👤 Henry C Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18; C08F14/02; C08F14/04; C08F14/08; C08F14/22
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |