Patent US3644302A successfully refreshed from Google Patents.
US3644302A
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Preparation of thermostabilisable polythiiranes
Assignee: Ethylene-Plastique
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Filing: 1968-12-10
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Granted: 1972-02-22
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Expires: 1988-12-10
Abstract
Abstract A PROCESS FOR THE PREPARATION OF THERMOSTABILISABLE POLYTHIIRANES IN WHICH IS USED AT LEAST ONE MONOMER SELECTED FROM COMPOUNDS OF THE GROUP OF THIIRANE AND PRODUCTS OBTAINED BY SUBSTITUTING IN THIIRANE AT LEAST ONE CARBON ATOMS, CHARACTERIZED IN THAT AT LEAST ONE PHENYL PHOSPHINE OUT OF THE THREE PHOSPHORUS VALENCES IS USED AS A CATALYST AND THAT POLYMERIZATION IS EFFECTED IN THE ABSENCE OF SOLVENT OR IN THE PRESENCE OF AT LEAST ONE APROTIC SOLVENT, AND THE POLYMERS THUS OBTAINED.
Inventors
- 👤 Adrien Nicco
- 👤 Bernard Boucheron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:50
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/06; C08G75/08
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |