Patent US3856849A successfully refreshed from Google Patents.
US3856849A
Expired / Lapsed
US
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Carboxylic acid perfluoroalkyl esters
Assignee: Novartis Corp
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Filing: 1973-10-17
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Granted: 1974-12-24
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Expires: 1993-10-17
Abstract
Abstract Carboxylic acid perfluoroalkyl esters of the formula WHEREIN Rf is a perfluorinated hydrocarbon radical with 1 to 22 carbon atoms, R is hydrogen or methyl, R1 is chlorine, unsubstituted or substituted phenyl or an alkoxy radical, A1 is a hydrocarbon radical with 2 or 3 carbon atoms derived from monobasic, dibasic or tribasic ethylenically unsaturated carboxylic acids and s is an integer from 1 to 3, and their polymerisation products are provided. The new esters and their polymerisation products are useful for rendering porous or nonporous substrates oil-, water- and dirt-repellent or to provide soil-release- anti soiling finishes.
Inventors
- 👤 Emden H Huber
- 👤 P Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:14
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/10; C08F22/12; C08F22/18; C08F20/00; C08F20/02; C08F20/10; C08F20/22; C08F20/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
8 words
CARBOXYLIC ACID PERFLUOROALKYL ESTERS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
8 words
CARBOXYLIC ACID PERFLUOROALKYL ESTERS CORRESPONDING TO THE FORMULA
Claim 3
Dependent Claim
26 words
Carboxylic acid perfluoroalkyl esters according to claim 1, wherein the perfluorinated hydrocarbon radical is a straight-chain or branched perfluoroalkyl radical with 4 to 17 carbon atoms.
Claim 4
Dependent Claim
13 words
Carboxylic acid perfluoroalkyl esters according to claim 1, which correspond to the formula
Claim 5
Dependent Claim
13 words
Carboxylic acid perfluoroalkyl esters according to claim 3, which correspond to the formula
Claim 6
Dependent Claim
13 words
Carboxylic acid perfluoroalkyl esters according to claim 4, which correspond to the formula
Claim 7
Dependent Claim
13 words
Carboxylic acid perfluoroalkyl esters according to claim 3, which correspond to the formula
Claim 8
Dependent Claim
13 words
Carboxylic acid perfluoroalkyl esters according to claim 6, which correspond to the formula
References Cited (Backward Citations)
US3457247A
Cited
US3514420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |