Patent US2921044A successfully refreshed from Google Patents.
US2921044A
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Method of making modified interpolymers containing vinyl chloride or vinylidene chloride
Assignee: Eastman Kodak Co
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Filing: 1954-11-26
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Granted: 1960-01-12
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Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:36
CPC Classifications
C; C08; C08F; C08F291/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS WHICH COMPRISES GRAFT COPOLYMERZING AT A TEMPERATURE OF 15-75*C. IN WATER AND IN THE PRESENCE OF A PEROXY POLYMERIZATION CATALYST A MIXTURE OF (A) 60-95% BY WEIGHT OF MONOMERIC MATERIAL CONSISTING OF 30-99% OF CHLORIDE MONOMER FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE AND 70-1% OF MONOMER FROM THE GROUP CONSISTING OF ACRYLONTRILE, ACRYLAMIDE, VINYL ACETATE, METHYL ACRYLATE, METHACRYLAMIDE, METHACRYLONTRILE, AND (B) 40-5% BY WEIGHT OF AN UNISOLATED PERFORMED COPOLYMER OF (1) 199% BY WEIGHT OF A MATERIAL (I) OF THE FORMULA
Claim 2
Dependent Claim
87 words
THE PROCESS WHICH COMPRISES GRAFT COPOLYMERZING AT A TEMPERATURE OF 15-75*C. IN WATER AND IN THE PRESENCE OF A PEROXY POLYMERIZATION CATALYST A MIXTURE OF (A) 60-95% BY WEIGHT OF MONOMERIC MATERIAL CONSISTING OF 30-99% OF CHLORIDE MONOMER FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE AND 70-1% OF MONOMER FROM THE GROUP CONSISTING OF ACRYLONTRILE, ACRYLAMIDE, VINYL ACETATE, METHYL ACRYLATE, METHACRYLAMIDE, METHACRYLONTRILE, AND (B) 40-5% BY WEIGHT OF AN UNISOLATED PERFORMED COPOLYMER OF (1) 199% BY WEIGHT OF A MATERIAL (I) OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |