US2763631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymers containing vinyl chloride or vinylidene chloride
Assignee: Eastman Kodak Co
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Filing: 1952-05-23
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Granted: 1956-09-18
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Expires: 1972-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:30
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PREPARING A RESINOUS BINARY ACRYLONITRILE POLYMER COMPRISING THE STEPS OF(1) HEATING FROM 30 TO 5 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE, IN AQUEOUS DISPERSION, IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST, UNTIL THE POLYMERIZATION REACTION IS COMPLETE AND (2) ADDING AT ONCE FROM 70 TO 95 PARTS BY WEIGHT OF ACRYLONITRILE AND AN ADDITIONAL AMOUNT OF THE PEROXIDE POLYMERIZATION CATALYST, AND HEATING THE REACTION MIXTURE UNTIL THE POLYMERIZATION REACTION IS COMPLETE.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PREPARING A RESINOUS BINARY ACRYLONITRILE POLYMER COMPRISING THE STEPS OF(1) HEATING FROM 30 TO 5 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE, IN AQUEOUS DISPERSION, IN THE PRESENCE OF A PEROXIDE POLYMERIZATION CATALYST, UNTIL THE POLYMERIZATION REACTION IS COMPLETE AND (2) ADDING AT ONCE FROM 70 TO 95 PARTS BY WEIGHT OF ACRYLONITRILE AND AN ADDITIONAL AMOUNT OF THE PEROXIDE POLYMERIZATION CATALYST, AND HEATING THE REACTION MIXTURE UNTIL THE POLYMERIZATION REACTION IS COMPLETE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |