US3799992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated vinyl ethers and use thereof
Assignee: United States Department of Agriculture
•
Filing: 1969-05-23
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Granted: 1974-03-26
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Expires: 1989-05-23
Abstract
Abstract Novel fluoroalkyl ethers, typically (CF3)2CF-O-CH2-CH2-Br, are prepared by reacting a ketone with an alkali metal fluoride, then reacting the resulting intermediate with a dihaloethane. These ethers may be dehydrohalogenated by reaction with alcoholic KOH to yield the corresponding fluoroalkyl vinyl ethers, e.g., (CF3)2CF-O-CH=CH2. The vinyl derivatives are useful for providing oil- and water-repellent coatings on fibrous materials, e.g., fabrics.
Inventors
- 👤 A Pittman
- 👤 W Wasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:50
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/347; D06M15/353; C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123; C08; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/24; D06M14/00; D06M14/18; D06M14/26; D06M15/327; D06M15/333
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
An Alpha -fluoroalkyl ether of the structure
Claim 2
Dependent Claim
7 words
An Alpha -fluoroalkyl ether of the structure
Claim 3
Dependent Claim
7 words
An Alpha -fluoroalkyl ether of the structure
Claim 4
Dependent Claim
7 words
An Alpha -fluoroalkyl ether of the structure
References Cited (Backward Citations)
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Cited
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US2336921A
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US3162622A
Cited
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Cited
US3453333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |