US3708537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain perfluoroalkyl sulfonamides
Assignee: 3M Co
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Filing: 1969-07-02
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Granted: 1973-01-02
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Expires: 1989-07-02
Abstract
Abstract A FLUOROCARBON AMIDE HAVING A HYDROGEN ATOM BONDED TO THE AMIDE NITROGEN (A PRIMARY OR SECONDARY AMIDE) IS ADDED ACROSS THE VINYL GROUP OF A VINYL SULFONE SO THAT THE HYDROGEN BECOMES BONDED TO ONE VINYL CARBON ATOM, THE REMAINDER OF THE FLUOROCARBON AMIDE BECOMES BONDED TO THE OTHER VINYL CARBON ATOM AND THE RESULTING ADDUCT IS RECOVERED. THE ADDUCTS FORMED BY THIS REACTION VARY FROM LIQUIDS TO SOLIDS TO POLYMERS AND FIND VARIED USES, E.G. AS DIELECTRIC FLUIDS, HEAT TRANSFER MEDIA, LUBRICANTS, RELEASE COATINGS, BARRIER LAMINANTS AND OIL- AND WATER-REPELLENT COATINGS.
Inventors
- 👤 J Groves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:14
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |