US3657320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoroalkoxyalkyl-substituted carbamates
Assignee: Honeywell International Inc
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Filing: 1968-11-08
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Granted: 1972-04-18
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Expires: 1988-11-08
Abstract
Abstract CARBAMATES AND DICARBAMATES OF FLUOROCARBON ALCOHOLS CHARACTERIZED BY HAVING A POLYFLUOROISOALKOXYALKY TRAIL WHEREIN AN ETHER OXYGEN ATOM LINKS A FLUORINATED CARBON ATOM CONNECTED TO TWO FLUOROALKYL GROUPS AND AT LEAST ONE -CF2- GROUP. THESE COMPOUNDS ARE USEFUL TO IMPART OIL AND WATER RESISTANCE TO FABRICS, LEATHER, AND THE LIKE.
Inventors
- 👤 Louis G Anello
- 👤 Richard F Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:21
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/08; G03D3/13; G03D3/135; C; C14; C14C; C14C9/00; G03D3/14
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |