Patent US3636085A successfully refreshed from Google Patents.
US3636085A
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US
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Perfluoroalkylsulfonamido - alkyl esters of fumaric acid and other ethylenically unsaturated polybasic acids and polymers thereof
Assignee: Novartis Corp
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Filing: 1969-04-01
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Granted: 1972-01-18
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Expires: 1989-04-01
Abstract
Abstract MONOMERIC PERFLUOROALKYLSULFONAMIDO-ALKYL ESTERS OF FUMARIC, MALEIC, CITRACONIC, MESACONIC, ITACONIC, ACONITIC, AND METHYLENE MALONIC ACID FORM HOMOPOLYMERS AND FORM COPOLYMERS WITH OTHER ETHYLENICALLY UNSATURATED COMONOMERS. THE POLYMERS OBTAINEDF HAVE VALUABLE SOIL REPELLENT PROPERTIES AND ARE THEREFORE ESPECIALLY USEFUL IN TEXTILE FINISHES. A PREFERED COMPOUND EXEMPLIFIED IS BIS(2-(NETHYL-N-PERFLUOROOCTANESULFONAMIDO)ETHYL) ITACONATE.
Inventors
- 👤 Eduard Karl Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:52
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |