Patent US2848434A successfully refreshed from Google Patents.
US2848434A
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Hydrosols prepared by polymerizing two monomers in the presence of a copolymer
Assignee: Eastman Kodak Co
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Filing: 1954-07-20
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Granted: 1958-08-19
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Expires: 1974-07-20
Abstract
No abstract record available.
Inventors
- 👤 Richard J Hellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:33
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/02; C08F265/10; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR PREPARING A HYDROSOL WHICH IS COMPATIBLE WITH GELATIN WHICH COMPRISES HEATING A MIXTURE CONSISTING OF WATER, A PEROXIDE POLYMERIZATION CATALYST, A COPOLYMER CONSISTING OF FROM 20-80% BY WEIGHT OF METHACRYLAMIDE AND 80-20% BY WEIGHT OF ACRYLIC ACID AND A MIXTURE OF MONOMERS CONSISTING OF FROM 10-90% BY WEIGHT OF AN ALKYL ACRYLATE, WHEREIN THE SAID ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS, AND 90-10% OF STYRENE, THE SAID COPOLYMER AND THE SAID MIXTURE OF MONOMERS BEING PRESENT IN THE RATIO OF FROM 0.5 TO 20 PARTS BY WEIGHT OF THE SAID COPOLYMER AND TO FROM 99.5 TO 80 PARTS BY WEIGHT OF THE SAID MIXTURE OF MONOMERS.
Claim 2
Dependent Claim
112 words
A PROCESS FOR PREPARING A HYDROSOL WHICH IS COMPATIBLE WITH GELATIN WHICH COMPRISES HEATING A MIXTURE CONSISTING OF WATER, A PEROXIDE POLYMERIZATION CATALYST, A COPOLYMER CONSISTING OF FROM 20-80% BY WEIGHT OF METHACRYLAMIDE AND 80-20% BY WEIGHT OF ACRYLIC ACID AND A MIXTURE OF MONOMERS CONSISTING OF FROM 10-90% BY WEIGHT OF AN ALKYL ACRYLATE, WHEREIN THE SAID ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS, AND 90-10% OF STYRENE, THE SAID COPOLYMER AND THE SAID MIXTURE OF MONOMERS BEING PRESENT IN THE RATIO OF FROM 0.5 TO 20 PARTS BY WEIGHT OF THE SAID COPOLYMER AND TO FROM 99.5 TO 80 PARTS BY WEIGHT OF THE SAID MIXTURE OF MONOMERS.
References Cited (Backward Citations)
US2123599A
Cited
US2133257A
Cited
US2476527A
Cited
US2620324A
Cited
US2653140A
Cited
US2666042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |