US4524105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-spun acrylonitrile polymer fiber of improved properties
Assignee: Wyeth Holdings LLC
•
Filing: 1980-04-14
•
Granted: 1985-06-18
•
Expires: 2000-04-14
Abstract
Abstract There is disclosed a melt-spun acrylonitrile polymer fiber of improved dye intensity and reduced shade change due to hot-wet processing.
Inventors
- 👤 William E. Streetman
- 👤 Shashikumar H. Daftary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:03
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
A melt-spun acrylonitrile polymer fiber wherein said acrylonitrile polymer has a composition of 87.6 parts acrylonitrile, 11.9 parts methyl methacrylate, 0.5 parts acrylamidomethylpropane sulfonic acid, and 3.5 parts polyvinyl alcohol, said fiber having a dye intensity of at least about 60, a shade change due to hot-wet processing of less than about 15, a straight tenacity of greater than about 3.8 grams per denier, a loop tenacity of greater than 2.5 grams per denier, and providing higher yarn spin limits than acrylonitrile polymer fiber produced by other spinning procedures while also providing higher yarn strength and single end breaks than comparable yarn spun from acrylonitrile polymer fiber produced by other spinning procedures.
Claim 2
Dependent Claim
112 words
A melt-spun acrylonitrile polymer fiber wherein said acrylonitrile polymer has a composition of 87.6 parts acrylonitrile, 11.9 parts methyl methacrylate, 0.5 parts acrylamidomethylpropane sulfonic acid, and 3.5 parts polyvinyl alcohol, said fiber having a dye intensity of at least about 60, a shade change due to hot-wet processing of less than about 15, a straight tenacity of greater than about 3.8 grams per denier, a loop tenacity of greater than 2.5 grams per denier, and providing higher yarn spin limits than acrylonitrile polymer fiber produced by other spinning procedures while also providing higher yarn strength and single end breaks than comparable yarn spun from acrylonitrile polymer fiber produced by other spinning procedures.
Claim 3
Dependent Claim
106 words
A melt-spun acrylonitrile polymer fiber wherein said acrylonitrile polymer has a composition of 89 parts acrylonitrile, 11.0 parts methlmethacrylate and 6.5 parts polyvinyl alcohol, said fiber having a dye intensity of at least about 60, a shade change due to hot-wet processing of less than about 15, a straight tenacity of greater than about 3.8 grams per denier, a loop tenacity of greater than 2.5 grams per denier, and providing higher yarn spin limits than acrylonitrile polymer fiber produced by other spinning procedures while also providing higher yarn strength and single end breaks than comparable yarn spun from acrylonitrile polymer fiber produced by other spinning procedures.
Claim 4
Dependent Claim
106 words
A melt-spun acrylonitrile polymer fiber wherein said acrylonitrile polymer has a composition of 89 parts acrylonitrile, 11.0 parts methlmethacrylate and 6.5 parts polyvinyl alcohol, said fiber having a dye intensity of at least about 60, a shade change due to hot-wet processing of less than about 15, a straight tenacity of greater than about 3.8 grams per denier, a loop tenacity of greater than 2.5 grams per denier, and providing higher yarn spin limits than acrylonitrile polymer fiber produced by other spinning procedures while also providing higher yarn strength and single end breaks than comparable yarn spun from acrylonitrile polymer fiber produced by other spinning procedures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |