Patent US4222273A successfully refreshed from Google Patents.
US3201445A
Expired / Lapsed
US
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Cyclic phosphonitrilate esters of polyfluoroether alcohols
Assignee: EIDP Inc
•
Filing: 1963-05-20
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Granted: 1965-08-17
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Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 John J Drysdale
- 👤 Bleu Ronald E Le
- 👤 John H Fassnacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:38
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6581; C07F9/65812; C07F9/65814; C10; C10M; C10M107/00; C10M107/48; C10M2223/00; C10M2223/02; C10M2223/049; C10N; C10N2040/00; C10N2040/08; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A CYCLIC PHOSPHONITRILATE OF THE FORMULA
Claim 2
Dependent Claim
6 words
A CYCLIC PHOSPHONITRILATE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |