US3554972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyarylsulfone resin
Assignee: Uniroyal Chemical Co Inc
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Filing: 1969-08-04
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Granted: 1971-01-12
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Expires: 1989-08-04
Abstract
Abstract THERMOPLASTIC POLYARYLSULFONE RESIN HAVING RECURRING UNITS OF THE STRUCTURE -O-(1,4-PHENYLENE)-C(-CH3)2-(1,4-PHENYLENE)-C(-CH3)2- (1,4-PHENYLENE)-O-(1,4-PHENYLENE)-SO2-(1,4-PHENYLENE)- IS MADE BY REACTING THE DIPOTASSIUM SALT OF ALPHA, ALPHA''BIS(4 - HYDROXYPHENYL) - P - DIISOPROPYLBENZENE WITH 4,4''-DICHLORODIPHENYL SULFONE. THE RESIN HAS A HIGH HEAT DISTORTION TEMPERATURE BUT GOOD PROCESSABILITY AND CAN BE INJECTION MOLDED. IT CAN BE BLENDED WITH ABS TO MAKE A TOUGH BUT READILY PROCESSABLE GUM-PLASTIC.
Inventors
- 👤 Robert J Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:34
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |