Patent US3723397A successfully refreshed from Google Patents.
US3723397A
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Ethylene/vinyl ester/carboxylic acid copolymers
Assignee: EIDP Inc
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Filing: 1971-02-02
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Granted: 1973-03-27
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Expires: 1991-02-02
Abstract
Abstract Ethylene/vinyl ester/carboxylic acid copolymers containing at least 35 weight percent vinyl ester and at least 0.5 weight percent monocarboxylic or dicarboxylic acid or the half ester of the latter. The copolymers are particularly suitable in nitrocellulose lacquers for coating metal substrates where enhanced flexibility and adhesion are required.
Inventors
- 👤 G Hoh
- 👤 D Tuites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:17
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F10/00; C08F218/00; C08F218/02; C08F218/04; C09; C09D; C09D131/00; C09D131/02; C08L; C08L1/00; C08L1/08; C08L1/16; C08L1/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
The copolymer of claim 1 wherein the acid is acrylic or methacrylic acid and the vinyl ester is vinyl acetate.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |