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US2805464A
Expired / Lapsed
US
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Fiber treatment
Assignee: EIDP Inc
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Filing: 1955-01-18
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Granted: 1957-09-10
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Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Bolmeyer James William
- 👤 Newnam James Alvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/52; D06M13/53; D02; D02G; D02G1/00; D02G1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR TREATING CRIMPED FIBERS MADE FROM ACRYLONITRILE COPOLYMERS DERIVED FROM AT LEAST ABOUT 85% OF ACRYLONITRILE WHICH COMPRISES SUBJECTING THE SAID FIBERS WHILE THEY ARE SUBSTANTIALLY FREE TO RELAX TO DRY HEAT AT A TEMPERATURE OF FROM ABOUT 300*F. TO ABOUT 350*F. UNTIL THE SAID FIBERS ATTAIN A TEMPERATURE OF AT LEAST ABOUT 300*F. AND TREATING THE RESULTANT, HEAT-RELAXED FIBERS WITH WATER AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 280*F. WHILE SAID FIBERS ARE SUBSTANTIALLY FREE OF TENSION .
Claim 2
Dependent Claim
83 words
A PROCESS FOR TREATING CRIMPED FIBERS MADE FROM ACRYLONITRILE COPOLYMERS DERIVED FROM AT LEAST ABOUT 85% OF ACRYLONITRILE WHICH COMPRISES SUBJECTING THE SAID FIBERS WHILE THEY ARE SUBSTANTIALLY FREE TO RELAX TO DRY HEAT AT A TEMPERATURE OF FROM ABOUT 300*F. TO ABOUT 350*F. UNTIL THE SAID FIBERS ATTAIN A TEMPERATURE OF AT LEAST ABOUT 300*F. AND TREATING THE RESULTANT, HEAT-RELAXED FIBERS WITH WATER AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 280*F. WHILE SAID FIBERS ARE SUBSTANTIALLY FREE OF TENSION .
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |