Patent US3578701A successfully refreshed from Google Patents.
US3578701A
Expired / Lapsed
US
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Fluorinated acids and esters
Assignee: EIDP Inc
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Filing: 1969-02-28
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Granted: 1971-05-11
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Expires: 1989-02-28
Abstract
Abstract PERFLUOROALKYL-TERMINATED ALKYL MALONIC ACIDS AND ESTERS OF THE FORMULA (R1-R'')ACH2-A(COOR)2 PREPARED FROM THE CORRESPONDING MALONIC ACID ESTER AND R1-R''-Z. THE ESTERS ARE USEFUL TO PREPARE PERFLUOROALKYL-TERMINATED ALKYL-1,3-PROPANEDIOLS OF THE FORMULA (R1-R'')ACH2-A(CH2OH)2 BY REDUCTION. THE ESTERS AND DIOLS CAN BE USED TO PREPARE POLYESTERS AND POLYURETHANES WHICH ARE IN GENERAL USEFUL AS FABRIC COATINGS TO IMPART OIL- AND WATER-REPELLENCY THERETO.
Inventors
- 👤 Kenneth C Smeltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:37
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C07; C07C; C07C55/00; C07C55/32; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3812; C08L; C08L75/00
Claims Analysis
Total Claims: 0
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |