US3018157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing uniformly dyeing polyacrylonitrile filaments by heat stretching the water wetted filaments
Assignee: EIDP Inc
•
Filing: 1954-10-28
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Granted: 1962-01-23
•
Expires: 1974-10-28
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kovarik
- 👤 Latschar Carl Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:03
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; Y; Y10; Y10S; Y10S8/00; Y10S8/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS FOR THE PRODUCTION OF A FILAMENT HAVING IMPROVE DYEING PROPERTIES AND BEING CAPABLE OF BEING DRAWN AT LEAST TWO TIME WHICH COMPRISES DRY SPINNING A SOLUTION IN AN INERT ORGANIC SOLVENT OF A COPOLYMER HAVING AT LEAST AN 85% ARYLONITRILE CONTENT AND UP TO 15% OF AN ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED THEREWITH, WINDING THE AS-SPUN FILAMENT
Claim 2
Dependent Claim
58 words
THE PROCESS FOR THE PRODUCTION OF A FILAMENT HAVING IMPROVE DYEING PROPERTIES AND BEING CAPABLE OF BEING DRAWN AT LEAST TWO TIME WHICH COMPRISES DRY SPINNING A SOLUTION IN AN INERT ORGANIC SOLVENT OF A COPOLYMER HAVING AT LEAST AN 85% ARYLONITRILE CONTENT AND UP TO 15% OF AN ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED THEREWITH, WINDING THE AS-SPUN FILAMENT
References Cited (Backward Citations)
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US2346208A
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US2404714A
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US2568920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |