US2879242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning solvent for acrylic fibers
Assignee: Honeywell International Inc
•
Filing: 1953-09-03
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Granted: 1959-03-24
•
Expires: 1973-09-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry H Weinstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:06
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A SPINNING SOLUTION COMPRISING A COPOLYMER OF ACRYLONITRILE AND AT LEAST ONE OTHER SUBSTANCE HAVING ETHYLENIC UNSATURATION, SAID COPOLYMER CONTAINING FROM 70 TO 98 WEIGHT PERCENT ACRYLONITRILE, AND A SOLVENT FOR SAID COPOLYMER COMPRISING ACETONITRILE, NITROMETHANE, AND WATER IN THE WEIGHT RATIO RANGE INDICATED IN THE DRAWING BY THE POLYGON ABCD; SAID SOLUTION HAVING SOLIDS CONCENTRATION OF AT LEAST 10 WEIGHT PERCENT.
Claim 2
Dependent Claim
62 words
A SPINNING SOLUTION COMPRISING A COPOLYMER OF ACRYLONITRILE AND AT LEAST ONE OTHER SUBSTANCE HAVING ETHYLENIC UNSATURATION, SAID COPOLYMER CONTAINING FROM 70 TO 98 WEIGHT PERCENT ACRYLONITRILE, AND A SOLVENT FOR SAID COPOLYMER COMPRISING ACETONITRILE, NITROMETHANE, AND WATER IN THE WEIGHT RATIO RANGE INDICATED IN THE DRAWING BY THE POLYGON ABCD; SAID SOLUTION HAVING SOLIDS CONCENTRATION OF AT LEAST 10 WEIGHT PERCENT.
References Cited (Backward Citations)
US2404714A
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US2537146A
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US2496267A
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US2658879A
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FR1018472A
Cited
BE497018A
Cited
US2603620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |