Patent US2990347A successfully refreshed from Google Patents.
US2990347A
Expired / Lapsed
US
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Preparation of carbon tetrafluoride
Assignee: EIDP Inc
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Filing: 1958-06-06
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Granted: 1961-06-27
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Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
- 👤 Blosser Lloyd George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:21
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/27; C25B3/28; C25B3/01; C25B3/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE PREPARATION OF CARBON TETRAFLUORIDE COMPRISING ELECTROLYZING A METAL FLUORIDE FROM THE CLASS CONSISTING OF ALKALI METAL FLUORIDES, ALKALINE EARTH METAL FLUORIDES AND MIXTURES THEREOF, SAID METAL FLUORIDE CONTAINING AT LEAST 10% BY WEIGHT OF SODIUM FLUORIDE, WITH A CARBON CONTAINING ANODE, IN THE SUBSTANTIAL ABSENCE OF OXYGEN, IN A POROUS CARBON CRUCIBLE CATHODE, AT A TEMPERATURE OF 1150*C. TO 1650*C., WITH A CELL VOLTAGE OF 2 TO 5 VOLTS, AND RECOVERING FROM SAID ANODE ESSENTIALLY PURE CARBON TETRAFLUORIDE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE PREPARATION OF CARBON TETRAFLUORIDE COMPRISING ELECTROLYZING A METAL FLUORIDE FROM THE CLASS CONSISTING OF ALKALI METAL FLUORIDES, ALKALINE EARTH METAL FLUORIDES AND MIXTURES THEREOF, SAID METAL FLUORIDE CONTAINING AT LEAST 10% BY WEIGHT OF SODIUM FLUORIDE, WITH A CARBON CONTAINING ANODE, IN THE SUBSTANTIAL ABSENCE OF OXYGEN, IN A POROUS CARBON CRUCIBLE CATHODE, AT A TEMPERATURE OF 1150*C. TO 1650*C., WITH A CELL VOLTAGE OF 2 TO 5 VOLTS, AND RECOVERING FROM SAID ANODE ESSENTIALLY PURE CARBON TETRAFLUORIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |