US3721696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyoxyperfluoromethylene compounds and process of their preparation
Assignee: Montedison SpA
•
Filing: 1970-11-27
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Granted: 1973-03-20
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Expires: 1990-11-27
Abstract
Abstract LINEAR POLYETHERS HAVING THE GROUP-COF AS A TERMINAL GROUP. POLYETHERS MAY BE OF THE FORMULA CF3O-(CF2O)M-COF OR CF3O-(CF2O)N-CF2-COF WHERE M IS A WHOLE NUMBER FROM 1 TO 100 AND N IS ZERO OR A WHOLE NUMBER FROM 1 TO 100.
Inventors
- 👤 G Moggi
- 👤 D Sianesi
- 👤 G Bernardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:46
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/125; C07C59/135
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |