US3618307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic fibers and process for preparing the fibers
Assignee: EIDP Inc
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Filing: 1968-11-14
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Granted: 1971-11-09
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Expires: 1988-11-14
Abstract
Abstract TEXTILE FIBERS OF SYNTHETIC ACRYLONITRILE POLYMER HAVING DISPERSED THROUGHOUT THE CROSS SECTION OF THE FIBER A SALT OF A PARTIAL ESTER OF PHOSPHORIC ACID WITH A MONOALKYL ETHER OF A POLYOXYALKYLENE GLYCOL; SAID SALT BEING PRESENT IN THE AMOUNT OF ABOUT 0.05% TO ABOUT 3% BY WEIGHT OF THE POLYMER TO REDUCE WASTE IN FOBER PROCESSING OPERATIONS AND TO PROVIDE A YARN OF THE FIBERS HAVING IMPROVED QUALITY. ALSO, THE PROCESS FOR PREPARING THE ABOVE FIBERS.
Inventors
- 👤 Imre M Jonkoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:43
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08L; C08L33/00; C08L33/18; C08L33/20; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2973; Y10T428/2978; Y10T428/298; Y10T428/31504; Y10T428/31855; Y10T428/31938
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |