US3773728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of fluoroalkyl ethers and maleic anhydride
Assignee: United States Department of Agriculture
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Filing: 1972-07-14
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Granted: 1973-11-20
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Expires: 1992-07-14
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
- 👤 W Wasley
- 👤 A Pittman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:42
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; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31895; Y10T428/31909; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2287
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |