US4029867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymers of fluoroalkyl ethers and maleic anhydride
Assignee: United States Department of Agriculture
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Filing: 1974-03-22
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Granted: 1977-06-14
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Expires: 1994-03-22
Abstract
Abstract Fluoroalkyl allyl (or methallyl) ethers are copolymerized with maleic anhydride. The copolymer products are useful for many purposes, including application to fibrous materials to provide both soil repellency and soil releasability.
Inventors
- 👤 William L. Wasley
- 👤 Allen G. Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:37
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/347; D06M15/353; C; C08; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/28; C08F222/00; C08F222/04; C08F222/06; C08F8/00; D06M15/263; D06M15/267; D06M15/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A film-forming addition terpolymer which contains - a. recurring units of the structure ##STR16## b. recurring units of the structure ##STR17## c. and recurring units of the structure ##STR18## the aforesaid units being in a molar ratio of 1:1:2.
Claim 2
Dependent Claim
39 words
A film-forming addition terpolymer which contains - a. recurring units of the structure ##STR16## b. recurring units of the structure ##STR17## c. and recurring units of the structure ##STR18## the aforesaid units being in a molar ratio of 1:1:2.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |