Patent US3723570A successfully refreshed from Google Patents.
US3723570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-vinyl acetate-allyl glycidyl ether terpolymer with polyvinyl chloride
Assignee: EIDP Inc
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Filing: 1971-07-29
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Granted: 1973-03-27
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Expires: 1991-07-29
Abstract
Abstract Specific copolymers of ethylene, a vinyl ester, and allyl glycidyl ether are disclosed as being particularly suitable plasticizers for polymers such as polyvinyl chloride. The copolymers have a molecular weight of about 400-3,000 and comprise 15-40 weight percent ethylene, 35-70 weight percent vinyl ester, and 15-35 weight percent allyl glycidyl ether.
Inventors
- 👤 R Adelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:29
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L31/00; C08L31/02; C08L31/04; C08L63/00; Y; Y10; Y10S; Y10S525/00; Y10S525/913
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The composition of claim 1 wherein said vinyl ester is vinyl acetate.
Claim 2
Dependent Claim
12 words
The composition of claim 1 wherein said vinyl ester is vinyl propionate.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein said copolymer has a molecular weight of 500-1,500.
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 |