Patent US3640927A successfully refreshed from Google Patents.
US3640927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization products of vinyl monomers and acrylate or vinyl ester terminated polyesters
Assignee: United States Department of Agriculture
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Filing: 1969-01-22
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Granted: 1972-02-08
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Expires: 1989-01-22
Abstract
Abstract THERE ARE DISCLOSED HEREIN ADDITION COPOLYMERS OF (A) A VINLY MONOMER AND (B) A POLYMERIZABLE POLYESTER, FOR EXAMPLE, AND ACRYLATE OR A VINYL ESTER OF A POLYESTER OF AN ALIPHATIC HYDROXYCARBOXYLIC ACID. A TYPICAL EXAMPLE IS THE COPOLYMER OF (A) VINYL CHLORIDE AND (B) A VINYL ESTER OF A POLYESTER OF 10-HYDROXYDECANOIC ACID. THIS COPOLYMER IS USEFUL FOR PREPARING FLEXIBLE FILMS.
Inventors
- 👤 Carl S Marvel
- 👤 Roberta C L Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:15
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0485
Claims Analysis
Total Claims: 0
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |