Patent US2684940A successfully refreshed from Google Patents.
US2684940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the electrolytic production of fluorine
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-07-20
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Granted: 1954-07-27
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Expires: 1970-07-20
Abstract
No abstract record available.
Inventors
- 👤 Rudge Alfred John
- 👤 Hill Harold
- 👤 Howell William Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:18
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/245; C25B9/00; C25B9/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CELL FOR THE PRODUCTION OF FLUORINE BY ELECTROLYSIS OF A LIQUID MIXTURE OF FLUORIDES WHICH COMPRISES A CONTAINER FOR THE ELECTROLYTE PROVIDED WITH A CATHODE AND A CARBON ANODE, THE UPPER PORTION OF SAID CARBON ANODE BEING OF SMALLER CROSS-SECTIONAL AREA AND LONGITUDINAL LENGTH THAN THE LOWER PORTION THEREOF AND SAID LESSER UPPER PORTION BEING POSITIONED ABOVE THE LEVEL OF THE TOP OF SAID CATHODE, AND A GAS COLLECTING HOOD OF METAL RESISTANT TO ATTACK BY THE ELECTROLYTE AND ELECTROLYTIC PRODUCTS POSITIONED TO SURROUND ONLY THE SAID LESSER UPPER PORTION OF SAID ANODE WITHOUT CONTACTING TTHE SAME, THE DOWNWARDLY GEOMETRICAL PROJECTION OF THE LOWEST EDGE OF WHICH HOOD LIES SUBSTANTIALLY WITHIN THE PERIPHERY OF THE MAJOR LOWER PORTION OF THE SAID ANODE, AND THE UPPER PORTION OF THE SAID HOOD BEING PROVIDED WITH AN OUTLET FOR GAS COLLECTED THEREIN.
Claim 2
Dependent Claim
140 words
A CELL FOR THE PRODUCTION OF FLUORINE BY ELECTROLYSIS OF A LIQUID MIXTURE OF FLUORIDES WHICH COMPRISES A CONTAINER FOR THE ELECTROLYTE PROVIDED WITH A CATHODE AND A CARBON ANODE, THE UPPER PORTION OF SAID CARBON ANODE BEING OF SMALLER CROSS-SECTIONAL AREA AND LONGITUDINAL LENGTH THAN THE LOWER PORTION THEREOF AND SAID LESSER UPPER PORTION BEING POSITIONED ABOVE THE LEVEL OF THE TOP OF SAID CATHODE, AND A GAS COLLECTING HOOD OF METAL RESISTANT TO ATTACK BY THE ELECTROLYTE AND ELECTROLYTIC PRODUCTS POSITIONED TO SURROUND ONLY THE SAID LESSER UPPER PORTION OF SAID ANODE WITHOUT CONTACTING TTHE SAME, THE DOWNWARDLY GEOMETRICAL PROJECTION OF THE LOWEST EDGE OF WHICH HOOD LIES SUBSTANTIALLY WITHIN THE PERIPHERY OF THE MAJOR LOWER PORTION OF THE SAID ANODE, AND THE UPPER PORTION OF THE SAID HOOD BEING PROVIDED WITH AN OUTLET FOR GAS COLLECTED THEREIN.
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) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |