US3896167A
Expired / Lapsed
US
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Perfluorinated linear polyethers
Assignee: Montedison SpA
•
Filing: 1973-08-30
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Granted: 1975-07-22
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Expires: 1993-08-30
Abstract
Abstract Perfluorinated cyclic ethers and fluorinated linear polyethers are prepared by photochemical reaction in liquid phase of perfluoropropylene with oxygen in presence of ultraviolet radiation.
Inventors
- 👤 Dario Sianesi
- 👤 Adolfo Pasetti
- 👤 Costante Corti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:52
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: 3
Claim 1
Independent Claim
29 words
A LINEAR PERFLUORINATED POLYETHER FORMED OF MOLECULES HAVING A CHAIN STRUCTURE CONSISTING OF A -C3F6-O- REPEATING UNIT AND AT LEAST ONE REPEATING UNIT SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
29 words
A LINEAR PERFLUORINATED POLYETHER FORMED OF MOLECULES HAVING A CHAIN STRUCTURE CONSISTING OF A -C3F6-O- REPEATING UNIT AND AT LEAST ONE REPEATING UNIT SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
20 words
The perfluorinated polyether of claim 1, wherein the ratio of the sum of the total -CF2-O- units and the total
References Cited (Backward Citations)
NL6504428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |