US3707528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of poly(arylene sulfide) reaction slurry constituents
Assignee: Phillips Petroleum Co
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Filing: 1971-01-12
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Granted: 1972-12-26
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Expires: 1991-01-12
Abstract
Abstract AN ECONOMICALLY IMPROVED METHOD FOR RECOVERY OF POLY(ARYLENE SULFIDE) SUBSTANTIALLY FREE OF IMPURITIES AND ORGANIC POLAR DILUENT FROM A REACTION SLURRY OF POLY(ARYLENE SULFIDE) SOLID POLYMER PARTICLES, ORGANIC POLAR DILLUENT, BY-PRODUCT ALKALI METAL HALIDE, AND OTHER IMPURITIES IS PROVIDED BY THE ATMOSPHEIC ADIABATIC EVAPORATION OF ORGANIC POLAR DILUENT FROM A REACTION SLURRY OF HIGH SENSIBLE HEAT CONTENT PRIOR TO PROCESSING POLY(ARYLENE SULFIDE) SOLID POLYMER PARTICLES TO REMOVE OTHER IMPURITIES.
Inventors
- 👤 John M Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0277; C08G75/0281; C08G75/0209; C08G75/0213; C08G75/025; C08G75/0254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |