US3565862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxybenzenesulfonyl halide polymerization
Assignee: Phillips Petroleum Co
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Filing: 1969-03-11
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Granted: 1971-02-23
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Expires: 1989-03-11
Abstract
Abstract HIGH MOLECULAR WEIGHT POLY (PHENYLENESULFONATE) HOMOPOLYMERS AND COPOLYMERS ARE PRODUCED BY THE CONDENSATION OF HYDROXYBENZENESULFONYL HALIDES IN THE PRESENCE OF EITHER A TERTIARY AMINE OR AN ALKALINE EARTH METAL HYDROXIDE CATALYST IN THE PRESENCE OF HEXAHYDROCARBYLPHOSPHORAMIDE REACTION DILUENTS. THE POLYMERS HAVE UTILITY AS FIBERS, FILMS, AND FOR OTHER MOLDED ARTICLES.
Inventors
- 👤 Robert W Campbell
- 👤 Harold Wayne Hill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:57
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/24
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |