Patent US3298940A successfully refreshed from Google Patents.
US3298940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination process
Assignee: 3M Co
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Filing: 1960-11-08
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Granted: 1967-01-17
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Expires: 1980-11-08
Abstract
No abstract record available.
Inventors
- 👤 Paul E Ashley
- 👤 Kenneth J Radimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:48
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/27; C25B3/28; C25B3/01; C25B3/11
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A PROCESS FOR THE PREPARATION OF FLUORINATED ORGANIC COMPOUNDS COMPRISING THE STEP OF SUBJECTING AN ACETYLENIC HYDROCARBON TO THE ACTION OF LIQUID ANHYDROUS HYDROFLUORIC ACID, CONTAINING THEREIN A SOLUBLE CONDUCTIVITY PROMOTING ALKALI METAL SALT OF HYDROFLUORIC ACID, DURING CONCOMITANT ELECTROLYSIS OF SAID HYDROFLUORIC ACID WHEREBY A PERFLUORINATED HYDROCARBON IS OBTAINED.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE PREPARATION OF FLUORINATED ORGANIC COMPOUNDS COMPRISING THE STEP OF SUBJECTING AN ACETYLENIC HYDROCARBON TO THE ACTION OF LIQUID ANHYDROUS HYDROFLUORIC ACID, CONTAINING THEREIN A SOLUBLE CONDUCTIVITY PROMOTING ALKALI METAL SALT OF HYDROFLUORIC ACID, DURING CONCOMITANT ELECTROLYSIS OF SAID HYDROFLUORIC ACID WHEREBY A PERFLUORINATED HYDROCARBON IS OBTAINED.
Claim 3
Dependent Claim
58 words
A PROCESS FOR THE ELECTROLYTIC PRODUCTION OF PERFLUOROALKANES WHICH COMPRISES ELECTROLLYZING AN ANHYDROUS ELECTROLYTE CONSISTING ESSENTIALLY OF HYDROGEN FLUORIDE AND AT LEAST ONE ALKALI METAL FLUORIDE, FEEDING TO THE ELECTROLYTIC CELL A PARTIALLY FLUORINATED SATURATED HYDROCARBON CONSISTING OF AT LEAST TWO CARBON ATOMS SUBSTITUTED SOLELY BY AT LEAST TWO FLUORINE ATOMS, AND RECOVERING A PERFLUOROALKANE AS A PRODUCT.
Claim 4
Dependent Claim
58 words
A PROCESS FOR THE ELECTROLYTIC PRODUCTION OF PERFLUOROALKANES WHICH COMPRISES ELECTROLLYZING AN ANHYDROUS ELECTROLYTE CONSISTING ESSENTIALLY OF HYDROGEN FLUORIDE AND AT LEAST ONE ALKALI METAL FLUORIDE, FEEDING TO THE ELECTROLYTIC CELL A PARTIALLY FLUORINATED SATURATED HYDROCARBON CONSISTING OF AT LEAST TWO CARBON ATOMS SUBSTITUTED SOLELY BY AT LEAST TWO FLUORINE ATOMS, AND RECOVERING A PERFLUOROALKANE AS A PRODUCT.
References Cited (Backward Citations)
US2519983A
Cited
US2841544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |