US2879254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of acrylonitrile and another monomer in the presence of preformed polymers and products obtained thereby
Assignee: Eastman Kodak Co
•
Filing: 1954-02-03
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Granted: 1959-03-24
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:07
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/10; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR PREPEARING A RESINOUS FIBER-FORMING GRAFT COPOLYMER WHICH COMPRISE HEATING A GRAFT COPOLYMERIZATION REACTION MIXTURE COMPRISING (1) WATER, (2) FROM 60 TO 95 PARTS BY WEIGHT OF A MONOMER MIXTURE CONSISTING OF FROM 85.0 TO 99.5% BY WEIGHT OF ACRYLONITRILE AND FROM 15.0 TO 0.5% BY WEIGHT OF A MONOMER REPRESENTED BY THE GENERAL FORMULAS:
Claim 2
Dependent Claim
57 words
A PROCESS FOR PREPEARING A RESINOUS FIBER-FORMING GRAFT COPOLYMER WHICH COMPRISE HEATING A GRAFT COPOLYMERIZATION REACTION MIXTURE COMPRISING (1) WATER, (2) FROM 60 TO 95 PARTS BY WEIGHT OF A MONOMER MIXTURE CONSISTING OF FROM 85.0 TO 99.5% BY WEIGHT OF ACRYLONITRILE AND FROM 15.0 TO 0.5% BY WEIGHT OF A MONOMER REPRESENTED BY THE GENERAL FORMULAS:
References Cited (Backward Citations)
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US2067234A
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US2311548A
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FR999594A
Cited
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Cited
US2620324A
Cited
US2749325A
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 |