US3793277A
Expired / Lapsed
US
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Solution and method of delustering acrylic fibers with particulate metal salt dispersant of copolymer of 1-olefin and maleic anhydride compound as aid
Assignee: Celanese Corp
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Filing: 1971-09-07
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Granted: 1974-02-19
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Expires: 1991-09-07
Abstract
Abstract DELUSTERING POLYACRYLONITRILE FIBERS BY DISPERSING A PARTICULATE DELUSTRANT IN A MIXTURE OF A SOLVENT COMPRISING A LOWER ALKYL NITRILE HAVING FROM 2 TO 4 CARBON ATOMS AND A METAL SALT OF A COPOLYMER OF A MALEIC ANHYDRIDE AND A 1-OLEFIN, AND INCORPORATING THE DELUSTRANT DISPERSION INTO POLYACRYLONITRILE TO FORM A SPINNING SOLUTION.
Inventors
- 👤 D Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:57
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L33/00; C08L33/18; C08L33/20; D01F1/00; D01F1/02; D01F1/10; D01F6/28; D01F6/38
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |