Patent US3385904A successfully refreshed from Google Patents.
US3385904A
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US
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Decyclization of fluorinated cyclic ethers to perfluorinated tertiary alcohols
Assignee: 3M Co
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Filing: 1962-10-30
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Granted: 1968-05-28
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Frank J Pavlik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:47
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07C; C07C29/00; C07C29/68; C07C29/70; C07C309/00; C07C309/63; C07C309/72; C07C309/73; C07C31/00; C07C31/28; C07C31/30; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/137; C07C59/00; C07C59/40; C07C59/76; C07C59/88; C07D303/00; C07D303/02; C07D303/48; C07D307/56; C07D307/60; C07F; C07F7/00; C07F7/02; C07F7/025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
A PROCESS WHICH COMPRISES REACTING A PERFLUOROISOALKYLENE OXIDE- 1,2 HAVING AT LEAST 4 AND NOT MORE THAN 20 CARBON ATOMS PER MOLECULE WITH ANHYDROUS HYDROGEN FLUORIDE AT A TEMPERATURE BETWEEN ABOUT 20 AND ABOUT 350*C. TO PRODUCE THE CORRESPONDING TETIARY-ALKYL ALCOHOL.
Claim 2
Dependent Claim
41 words
A PROCESS WHICH COMPRISES REACTING A PERFLUOROISOALKYLENE OXIDE- 1,2 HAVING AT LEAST 4 AND NOT MORE THAN 20 CARBON ATOMS PER MOLECULE WITH ANHYDROUS HYDROGEN FLUORIDE AT A TEMPERATURE BETWEEN ABOUT 20 AND ABOUT 350*C. TO PRODUCE THE CORRESPONDING TETIARY-ALKYL ALCOHOL.
Claim 3
Dependent Claim
19 words
THE PROCESS OF CLAIM 1 IN WHICH SAID PERFLUOROISOALKYLENE OXIDE-1,2 IS PERFLUOROISOBUTENE OXIDE-1,2 AND THE PRODUCT IS PERFLUORO-TERT-BUTYL ALCOHOL.
References Cited (Backward Citations)
US3227674A
Cited
US3213134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |