US3083071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of synthetic fiber tow
Assignee: Wyeth Holdings LLC
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Filing: 1959-12-21
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Granted: 1963-03-26
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Wishman Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF RELAXING DRIED FILAMENTARY MATERIAL COMPRISED OF A POLYMER SELECTED FROM THE GROUP CONSISTING OF (1) HOMOPOLYMERIC ACRYLONITRILE AND (2) THERMOPLASTIC COPOLYMERS OF ACRYLONITRILE HAVING COMBINED IN THE COPOLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE, THE REMAINDER BEING AT LEAST ONE OTHER DIFFERENT MONOETHYLENICALLY UNSATURATED MONOMER WHICH IS COPOLYMERIZABLE WITH ACRYLONITRILE, SAID METHOD COMPRISING TREATING THE SAID DRIED FILAMENTARY MATERIAL WITH AN AQUEOUS ACETIC ACID SOLUTION CONTAINING FROM 50% TO 80% BY WEIGHT OF ACETIC ACID AT AN ELEVATED TEMPERATURE, THE DEGREE OF RELAXATION BEING A FUNCTION OF SAID ELEVATED TEMPERATURE.
Claim 2
Independent Claim
95 words
THE METHOD OF RELAXING DRIED FILAMENTARY MATERIAL COMPRISED OF A POLYMER SELECTED FROM THE GROUP CONSISTING OF (1) HOMOPOLYMERIC ACRYLONITRILE AND (2) THERMOPLASTIC COPOLYMERS OF ACRYLONITRILE HAVING COMBINED IN THE COPOLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE, THE REMAINDER BEING AT LEAST ONE OTHER DIFFERENT MONOETHYLENICALLY UNSATURATED MONOMER WHICH IS COPOLYMERIZABLE WITH ACRYLONITRILE, SAID METHOD COMPRISING TREATING THE SAID DRIED FILAMENTARY MATERIAL WITH AN AQUEOUS ACETIC ACID SOLUTION CONTAINING FROM 50% TO 80% BY WEIGHT OF ACETIC ACID AT AN ELEVATED TEMPERATURE, THE DEGREE OF RELAXATION BEING A FUNCTION OF SAID ELEVATED TEMPERATURE.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |