US3575944A
Expired / Lapsed
US
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Process of improving the basic dye acceptance of acrylonitrile-polymer containing fibers by using an alkaryl polyethoxy phosphate ester
Assignee: Monsanto Co
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Filing: 1966-12-27
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Granted: 1971-04-20
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Expires: 1986-12-27
Abstract
Abstract A PROCESS OF IMPROVING THE BASIC DYE ACCEPTANCE OF ACRYLONITRILE-POLYMER CONTAINING FIBERS BY MIXING, PRIOR TO EXTRUSION INTO SAID ACRYLONITRILE POLYMER, FROM ABOUT 0.5 TO ABOUT 10%, BASED ON THE WEIGHT OF THE POLYMER, OF AN ALKARYL POLYETHOXY PHOSPHATE ESTER.
Inventors
- 👤 Ernest F Stroh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |