Patent US2613228A successfully refreshed from Google Patents.
US2613228A
Expired / Lapsed
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Production of unsaturated fluorinecontaining alicyclic ethers
Assignee: Dow Chemical Co
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Filing: 1950-06-02
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Granted: 1952-10-07
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Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF PRODUCING AN UNSATURATED, FLUORINE-CONTAINING ALICYCLIC ETHER THAT COMPRISES SUBJECTING (A) 1,2-DICHLORO-3,3,4,4-TETRAFLUORO CYCLOBUTENE TO THE ACTION OF (B) AN ACYCLIC HYDROXYSUBSTITUTED HYDROCARBON HAVING NON MORE THAN FOUR CARBON ATOMS, NOT MORE THAN ONE ETHYLENIC DOUBLE BOND, AND NO ACETYLENIC UNSATURATION, IN THE PRESENCE OF (C) A BASE OF THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALI METALS, AND ALKALI METAL SALTS OF ACYCLIC HYDROXYL-HYDROCARBONS HAVING NOT MORE THAN FOUR CARBON ATOMS.
Claim 2
Independent Claim
73 words
A METHOD OF PRODUCING AN UNSATURATED, FLUORINE-CONTAINING ALICYCLIC ETHER THAT COMPRISES SUBJECTING (A) 1,2-DICHLORO-3,3,4,4-TETRAFLUORO CYCLOBUTENE TO THE ACTION OF (B) AN ACYCLIC HYDROXYSUBSTITUTED HYDROCARBON HAVING NON MORE THAN FOUR CARBON ATOMS, NOT MORE THAN ONE ETHYLENIC DOUBLE BOND, AND NO ACETYLENIC UNSATURATION, IN THE PRESENCE OF (C) A BASE OF THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, ALKALI METALS, AND ALKALI METAL SALTS OF ACYCLIC HYDROXYL-HYDROCARBONS HAVING NOT MORE THAN FOUR CARBON ATOMS.
References Cited (Backward Citations)
US2409274A
Cited
US2433844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |