US2865893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis copolymers of vinyl acetate and unsaturated carbamates
Assignee: Eastman Kodak Co
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Filing: 1954-07-27
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Granted: 1958-12-23
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Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Cornelius C Unruh
- 👤 Donald A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; C08J; C08J5/00; C08J5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF MAKING A WATER-SOLUBLE POLYMER CAPABLE OF BEING READILY HARDENED BY FORMALDEHYDE WHICH COMPRISES COPOLYMERIZING ABOUT 80-99% BY WEIGHT OF VINYL ACETATE WITH ABOUT 1-20% BY WEIGHT OF AN ALLYLIC URETHANE FROM THE GROUP CONSISTING OF ALLYL AND METHALLYL CARBAMATES, AND HYDROLYZING THE RESULTING WATER-INSOLUBLE COPOLYMER WITH A SOLUTION OF AN ALKALI METAL HYDROXIDE IN ALCOHOL TO A WATER-SOLUBLE POLYMER HAVING A NITROGEN CONTENT OF 0.3-2.9%.
Claim 2
Independent Claim
68 words
THE METHOD OF MAKING A WATER-SOLUBLE POLYMER CAPABLE OF BEING READILY HARDENED BY FORMALDEHYDE WHICH COMPRISES COPOLYMERIZING ABOUT 80-99% BY WEIGHT OF VINYL ACETATE WITH ABOUT 1-20% BY WEIGHT OF AN ALLYLIC URETHANE FROM THE GROUP CONSISTING OF ALLYL AND METHALLYL CARBAMATES, AND HYDROLYZING THE RESULTING WATER-INSOLUBLE COPOLYMER WITH A SOLUTION OF AN ALKALI METAL HYDROXIDE IN ALCOHOL TO A WATER-SOLUBLE POLYMER HAVING A NITROGEN CONTENT OF 0.3-2.9%.
References Cited (Backward Citations)
US2388851A
Cited
US2483194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |