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US3770792A
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Fluorinated oxygen-containing copolymers
Assignee: Montedison SpA
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Filing: 1971-06-10
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Granted: 1973-11-06
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Expires: 1991-06-10
Abstract
Abstract PERFLUORINATED LINEAR POLYETHERS ARE PREPARED BY LIQUID PHASE PHOTOCHEMICAL REACTION OF A MIXTURE OF PERFLUOROPROPYLENE AND TETRAFLUOROETHYLENE WITH OXYGEN IN THE PRESENCE OF ULTRAVIOLET RADIATION.
Inventors
- 👤 D Sianesi
- 👤 A Pasetti
- 👤 C Corti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
C; C10; C10M; C10M3/00; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; C01; C01B; C01B32/00; C01B32/70; C01B32/80; C07; C07C; C07C51/00; C07C51/58; C07C59/00; C07C59/125; C07C59/135; C07C59/235; C07C59/245; C07C59/295; C07D; C07D303/00; C07D303/02; C07D303/48; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G67/00; C09; C09K; C09K5/00; C09K5/08; C09K5/10; C11; C11D; C11D1/00; C11D1/004; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/16; C10M2215/24; C10M2215/28; C10N; C10N2040/00; C10N2040/08; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/10; Y; Y10; Y10S; Y10S522/00; Y10S522/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3250806A
Cited
US3515701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |