US2883360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process for preparing modified acrylonitrile polymers
Assignee: Eastman Kodak Co
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Filing: 1954-02-03
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Granted: 1959-04-21
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Donald J Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:36
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F291/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES INTRODUCING CONTINUOUSLY INTO A POLYMERIZATION REACTOR VESSEL A GRAFT COPOLYMERIZATION MIXTURE COMPRISING (1) WATER, (2) FROM 60 TO 95 PARTS BY WEIGHT OF A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MONOMER MIXTURES CONSISTING OF FROM 85.0 TO 99.5% BY WEIGHT OF ACRYLONITRILE AND FROM 15.0 TO 0.5% BY WEIGHT OF A DIFFERENT MONOETHYLENICALLY UNSATURATED, POLYMERIZABLE MONOMER CONTAINING A SINGLE -CH=C<GROUP, (3) A PEROXIDE POLYMERIZATION CATALYST AND (4) FROM 40 TO 5 PARTS BY WEIGHT OF A PREFORMED POLYMER OF A COMPOUND REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
100 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES INTRODUCING CONTINUOUSLY INTO A POLYMERIZATION REACTOR VESSEL A GRAFT COPOLYMERIZATION MIXTURE COMPRISING (1) WATER, (2) FROM 60 TO 95 PARTS BY WEIGHT OF A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MONOMER MIXTURES CONSISTING OF FROM 85.0 TO 99.5% BY WEIGHT OF ACRYLONITRILE AND FROM 15.0 TO 0.5% BY WEIGHT OF A DIFFERENT MONOETHYLENICALLY UNSATURATED, POLYMERIZABLE MONOMER CONTAINING A SINGLE -CH=C<GROUP, (3) A PEROXIDE POLYMERIZATION CATALYST AND (4) FROM 40 TO 5 PARTS BY WEIGHT OF A PREFORMED POLYMER OF A COMPOUND REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2486241A
Cited
GB627265A
Cited
GB679562A
Cited
US2649434A
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US2620324A
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US2657191A
Cited
FR1054343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |