Patent US3658843A successfully refreshed from Google Patents.
US3658843A
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US
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Amides and imides of fluorinated alkylamines and maleic and other ethylenically unsaturated dibasic acids and polymers thereof
Assignee: Novartis Corp
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Filing: 1969-04-30
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Granted: 1972-04-25
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Expires: 1989-04-30
Abstract
Abstract MONOMERIC AMIDES OF FLUORINATED ALKYLAMINES AND FUMARIC, MALEIC, CITRACONIC, MESACONIC AND ITACONIC ACIDS; AND MONOMERIC IMIDES OF SUCH FLUORINATED ALKYLAMINES AND MALEIC, CITRACONIC AND ITACONIC ACIDS FORM HOMOPOLYMERS AND COPOLYMERS WITH OTHER ETHYLENICALLY UNSATURATED COMONOMERS. THE POLYMERS OBTAINED HAVE VAULABLE SOIL REPELLENT PROPERTIES WHICH ARE ESPECIALLY USEFUL IN TEXTILE FINISHES. PREFERRED COMPOUNDS EXEMPLIFIED ARE N-1,1-DIHYDROPERFLUOROOCTYLMALEIMIDE AND BIS(N-1,1-DIHYDROPERFLUOROOCTYL)ITACONAMIDE.
Inventors
- 👤 Eduard Karl Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:42
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; C08; C08F; C08F22/00; C08F22/36; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; D06M15/295; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721; Y10T428/31855; Y10T428/31909; Y10T428/31913
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |