US3451908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing polyoxyperfluoromethylenic compounds
Assignee: Montedison SpA
•
Filing: 1967-07-13
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Granted: 1969-06-24
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Expires: 1987-07-13
Abstract
No abstract record available.
Inventors
- 👤 Dario Sianesi
- 👤 Giancarlo Bernardi
- 👤 Giovanni Moggi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:15
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C07; C07C; C07C59/00; C07C59/125; C07C59/135; D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/207; D06M13/217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3392097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |