US2808388A
Expired / Lapsed
US
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Hydrosols of acrylic esters and hydrophobic monomers polymerized with cationic or ampholytic hydrophilic copolymers and process for making same
Assignee: Eastman Kodak Co
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Filing: 1955-07-29
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Granted: 1957-10-01
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Richard J Hellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F265/00; C08F265/10; C08F271/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A PROCESS FOR PREPARING A HYDROSOL WHICH IS COMPATIBLE WITH GELATIN WHICH COMPRISES HEATING A MIXTURE OF WATER, A PEROXIDE POLYMERIZATION CATALYST, A COPOLYMER OF 20-80% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF METHACRY LAMIDE AND METHACRYLIC ACID AND 8020% BY WEIGHT OF A HYDROCOHLORIDE SALT OF A BASIC MONOMER FROM THE GROUP CONSISTING OF VINYL PYRIDINES AND N,NDIALKY AMINOETHYLACRYLATES, WHEREIN EACH ALKYL GROUP CONTAINS 1-2 CARBON ATOMS, AND A MIXTURE OF MONOMERS CONSISTING OF 10-90% BY WEIGHT OF ACRYLIC ESTER FROM THE GROUP CONSISTING OF ALKYL ACRYLATES AND ALKYL METHACRYLATES WHEREIN EACH ALKYL GROUP CONTAINS 1-4 CARBON ATOMS AND 90-10% BY WEIGHT OF HYDROPHOBIC MONOMER FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, BUTADIENE AND VINYLIDENE CHLORIDE, SAID COPOLYMER AMOUNTING TO 5-40% AND SAID MIXTURE OF MONOMERS AMOUNTING TO 60-95% OF THE COMBINED WEIGHT OF SAID COPOLYMER AND SAID MONOMERS.
Claim 2
Dependent Claim
143 words
A PROCESS FOR PREPARING A HYDROSOL WHICH IS COMPATIBLE WITH GELATIN WHICH COMPRISES HEATING A MIXTURE OF WATER, A PEROXIDE POLYMERIZATION CATALYST, A COPOLYMER OF 20-80% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF METHACRY LAMIDE AND METHACRYLIC ACID AND 8020% BY WEIGHT OF A HYDROCOHLORIDE SALT OF A BASIC MONOMER FROM THE GROUP CONSISTING OF VINYL PYRIDINES AND N,NDIALKY AMINOETHYLACRYLATES, WHEREIN EACH ALKYL GROUP CONTAINS 1-2 CARBON ATOMS, AND A MIXTURE OF MONOMERS CONSISTING OF 10-90% BY WEIGHT OF ACRYLIC ESTER FROM THE GROUP CONSISTING OF ALKYL ACRYLATES AND ALKYL METHACRYLATES WHEREIN EACH ALKYL GROUP CONTAINS 1-4 CARBON ATOMS AND 90-10% BY WEIGHT OF HYDROPHOBIC MONOMER FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, BUTADIENE AND VINYLIDENE CHLORIDE, SAID COPOLYMER AMOUNTING TO 5-40% AND SAID MIXTURE OF MONOMERS AMOUNTING TO 60-95% OF THE COMBINED WEIGHT OF SAID COPOLYMER AND SAID MONOMERS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |