Patent US3868408A successfully refreshed from Google Patents.
US3868408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylenically unsaturated dicarboxylic acid esters of {60 , {60 -dihydroperfluoro alcohols
Assignee: Air Products and Chemicals Inc
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Filing: 1971-09-27
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Granted: 1975-02-25
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Expires: 1991-09-27
Abstract
Abstract The alpha, beta-ethylenically unsaturated dicarboxylic acid ester of an alpha, alpha-dihydroperfluoroalcohol is prepared by sulfation of the fluorinated alcohol with oleum, sulfur trioxide or chlorosulfonic acid and subsequent esterification of the resulting sulfate with maleic, fumaric, mesaconic, citraconic or itaconic acid. The resulting alpha, beta-ethylenically unsaturated esters of the alpha, alpha-dihydroperfluoroalcohols can be polymerized and applied to materials as coating compositions with high glass transition temperatures, high utility temperatures and resistance to soiling.
Inventors
- 👤 Dewey George Holland
- 👤 Burton David Beitchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08F; C08F22/00; C08F22/10; C08F22/12; C08F22/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
33 words
A DIESTER HAVING THE FORMULA: (RFCH2)2R WHERE RF IS CNF2N+1(C6F10); C6F10 IS A PERFLUOROCYCLOPHEXANE RING WHERE N IS AN INTEGER OF FROM 0 TO 4; AND WHERE R IS (-02CCH:CHC02-), (-02CCH:C(CH3)C02-) OR (-02CC8CH2)CH2CO2-).
Claim 2
Dependent Claim
33 words
A DIESTER HAVING THE FORMULA: (RFCH2)2R WHERE RF IS CNF2N+1(C6F10); C6F10 IS A PERFLUOROCYCLOPHEXANE RING WHERE N IS AN INTEGER OF FROM 0 TO 4; AND WHERE R IS (-02CCH:CHC02-), (-02CCH:C(CH3)C02-) OR (-02CC8CH2)CH2CO2-).
Claim 3
Dependent Claim
9 words
The diester of claim 1 wherein R is (-O2CCH:CHCO2-).
Claim 4
Dependent Claim
9 words
The diester of claim 1 wherein R is (-O2CC(CH2)CH2CO2-).
Claim 5
Dependent Claim
9 words
The diester of claim 1 wherein R is (-O2CCH:C(CH3)CO2-).
Claim 6
Dependent Claim
21 words
The diester of a dibasic acid and alpha, alpha-dihydroperfluorocyclohexanecarbinol wherein the dibasic acid is maleic, fumaric, mesaconic, citraconic or itaconic acid.
Claim 7
Dependent Claim
21 words
The diester of a dibasic acid and alpha, alpha-dihydroperfluorocyclohexanecarbinol wherein the dibasic acid is maleic, fumaric, mesaconic, citraconic or itaconic acid.
Claim 8
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) fumarate.
Claim 9
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) fumarate.
Claim 10
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) itaconate.
Claim 11
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) itaconate.
Claim 12
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) mesaconate.
Claim 13
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) mesaconate.
Claim 14
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) maleate.
Claim 15
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) maleate.
Claim 16
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) citraconate.
Claim 17
Dependent Claim
3 words
Di-(alpha, alpha-dihydroperfluorocyclohexanecarbinol) citraconate.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |