US3291844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic preparation of fluoroethers
Assignee: Dow Chemical Co
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Filing: 1963-10-10
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Granted: 1966-12-13
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Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Sr John D Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C41/16; C07C41/18; C07C41/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A PROCESS FOR PREPARING FLUOROETHERS WHICH COMPRISES; (A) PLACING A MIXTURE OF A SATURATED MONOHYDROXY UNSUBSTITUTED ALIPHATIC ALCOHOL AND AN ALKALI METAL FLUORIDE IN A REACTION VESSEL, SAID ALCOHOL HAVING FROM 1 TO ABOUT 4 CARBON ATOMS AND THE WEIGHT RATIO OF SAID ALCOHOL TO SAID ALKALI METAL FLUORIDE RANGING FROM ABOUT 120 TO ABOUT 3, (B) REMOVING SUBSTANTIALLY ALL OF THE AIR FROM SAID REACTOR, (C) INTRODUCING OVER A PERIOD OF TIME AT ABOUT ROOM TEMPERATURE AND SUBATMOSPHERIC PRESSURE A MEMBER SELECTED FROM THE GROUP CONSISTING OF OLEFINIC AND ACETYLENIC PERFLUOROCARBONS INTO SAID REACTION VESSEL, SAID PERFLUOROCARBON CONTAINING FROM 2 TO ABOUT 6 CARBON ATOMS, THE AMOUNT OF SAID PERFLUOROCARBON AT A MAXIMUM BEING ABOUT EQUAL TO THAT REQUIRED FOR STOICHIOMETRIC BALANCE FOR PRODUCTION OF THE CORRESPONDING ALKYL FLLUOROALKYL ETHER, OR ALKYL FLUOROLKENE ETHER AND RECOVERING THE CORRESPONDING ALKYL FLUOROALKYL ETHER OR ALKYL FLUOROALKENE ETHER THEREFROM.
Claim 2
Dependent Claim
147 words
A PROCESS FOR PREPARING FLUOROETHERS WHICH COMPRISES; (A) PLACING A MIXTURE OF A SATURATED MONOHYDROXY UNSUBSTITUTED ALIPHATIC ALCOHOL AND AN ALKALI METAL FLUORIDE IN A REACTION VESSEL, SAID ALCOHOL HAVING FROM 1 TO ABOUT 4 CARBON ATOMS AND THE WEIGHT RATIO OF SAID ALCOHOL TO SAID ALKALI METAL FLUORIDE RANGING FROM ABOUT 120 TO ABOUT 3, (B) REMOVING SUBSTANTIALLY ALL OF THE AIR FROM SAID REACTOR, (C) INTRODUCING OVER A PERIOD OF TIME AT ABOUT ROOM TEMPERATURE AND SUBATMOSPHERIC PRESSURE A MEMBER SELECTED FROM THE GROUP CONSISTING OF OLEFINIC AND ACETYLENIC PERFLUOROCARBONS INTO SAID REACTION VESSEL, SAID PERFLUOROCARBON CONTAINING FROM 2 TO ABOUT 6 CARBON ATOMS, THE AMOUNT OF SAID PERFLUOROCARBON AT A MAXIMUM BEING ABOUT EQUAL TO THAT REQUIRED FOR STOICHIOMETRIC BALANCE FOR PRODUCTION OF THE CORRESPONDING ALKYL FLLUOROALKYL ETHER, OR ALKYL FLUOROLKENE ETHER AND RECOVERING THE CORRESPONDING ALKYL FLUOROALKYL ETHER OR ALKYL FLUOROALKENE ETHER THEREFROM.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |