US3634575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt extrusion of acrylonitrile polymers
Assignee: Celanese Corp
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Filing: 1968-10-02
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Granted: 1972-01-11
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Expires: 1988-10-02
Abstract
Abstract HIGH POLYACRYLONITRILE POLYMERS CONTAINING AT LEAST 85 PERCENT ACRYLONITRILE CAN BE MELT EXTRUDED INTO USEFUL SHAPED ARTICLES WHEN PLASTICIZED WITH A PLASTICIZING SYSTEM COMPRISING A LOW BOILING ACETONITRILE FRACTION AND A HIGH BOILING FRACTION CAPABLE OF PLASTICIZING THE POLYACRYLONIAT EXTRUSION TEMPERATURES.
Inventors
- 👤 George Allibone Serad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/54; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0016
Claims Analysis
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |