US2956884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of polyacrylates with gelatin and other proteins
Assignee: Eastman Kodak Co
•
Filing: 1957-03-26
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Granted: 1960-10-18
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Expires: 1977-03-26
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
C; C08; C08F; C08F289/00; C08F220/00; C08F220/02; C08F220/10; C08F220/12; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/047; G03C1/76; G03C1/91; G03C1/93; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A POLYMERIZATION PRODUCT OBTAINED BY POLYMERIZING, AT A TEMPERATURE OF 50-75*C. WITH A POLYMERIZATION CATALYST, A COMPOSITION COMPRISING AN AQUEOUS SOLUTION OF GELATIN AND A MIXTURE OF AN ALKYL ACRYLATE IN WHICH THE ALKYL RADICAL CONTAIN 1-6 CARBON ATOMS AND A CROSSLINKING AGENT SELECTED FROM THE CLASS CONSISTING OF DIVINYL BENZENE, ALLYL ACRYLATE AND DIALLYL PHTHALATE, SAID COMPOSITION CONTAINING ON A SOLIDS CONTENT BASIS FROM 33-85% BY WEIGHT OF THE GELATIN AND FROM 15-67% BY WEIGHT OF THE SAID MIXTURE, THE SAIDS MIXTURE CONSISTING OF THE ALKYL ACRYLATE AND THE CROSS-LINKING AGENT WITH THE LATTER BEING PRESENT IN AN AMOUNT FROM 0.5-5% BASED ON THE WEIGHT OF THE ALKYL ACRYLATE.
Claim 2
Dependent Claim
110 words
A POLYMERIZATION PRODUCT OBTAINED BY POLYMERIZING, AT A TEMPERATURE OF 50-75*C. WITH A POLYMERIZATION CATALYST, A COMPOSITION COMPRISING AN AQUEOUS SOLUTION OF GELATIN AND A MIXTURE OF AN ALKYL ACRYLATE IN WHICH THE ALKYL RADICAL CONTAIN 1-6 CARBON ATOMS AND A CROSSLINKING AGENT SELECTED FROM THE CLASS CONSISTING OF DIVINYL BENZENE, ALLYL ACRYLATE AND DIALLYL PHTHALATE, SAID COMPOSITION CONTAINING ON A SOLIDS CONTENT BASIS FROM 33-85% BY WEIGHT OF THE GELATIN AND FROM 15-67% BY WEIGHT OF THE SAID MIXTURE, THE SAIDS MIXTURE CONSISTING OF THE ALKYL ACRYLATE AND THE CROSS-LINKING AGENT WITH THE LATTER BEING PRESENT IN AN AMOUNT FROM 0.5-5% BASED ON THE WEIGHT OF THE ALKYL ACRYLATE.
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |