US3553179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylate-type esters of perfluoropoly-oxa-alkaneamidoalkyl alcohols and their polymers
Assignee: EIDP Inc
•
Filing: 1968-05-06
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Granted: 1971-01-05
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Expires: 1988-05-06
Abstract
Abstract MONOMERS OF THE FORMULA RFO(CF(CF3)CF2O)NCF(CF3)C (O)-N(R'')RO2CC(R")"CH2 WHEREIN RF IS PERFLUOROALKYL, N IS 0-8, R'' IS HYDROGEN OR LOWER ALKYL, R IS ALKYLENE, AND R" IS HYDROGEN OR METHYL. HOMOPOLYMERS OF THE ABOVE-DESCRIBED MONOMERS AND COPOLYMERS OF THEM WITH VINYLIDENE MONOMERS. THE POLYMERS ARE USEFUL AS OIL AND WATER REPELLENTS AND AS METAL CORROSION INHIBITORS.
Inventors
- 👤 Philip Lee Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |