US2879212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic fluorine manufacture
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1955-12-19
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Granted: 1959-03-24
•
Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Hill Harold
- 👤 Rudge Alfred John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:25
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS FOR THE MANUFACTURE OF FLUORINE BY THE ELECTORYSIS OF A MOLTEN MIXTURE OF POTASSIUM FLOURIDE AND HYDROGEN FLUORIDE IN AN ELECTROLYTIC CELL THEREIN HYDROGEN FLUORIDE IN THE EVOLVED FLUORINE IS REMOVED, THE IMPROVED METHOD OF REMOVING SAID HYDROGEN FLUORIDE FROM SAID EVOLVED FLUORINE COMPRISING SCRUBBING THE FLUORINE COMTAMINATED WITH HYDROGEN FLUORIDE WITH A MOLTEN MIXTURE OF POTASSIUM FLUORIDE AND HYDROGEN FLUORIDE WHICH IS OF SUCH A HYDROGEN CONTENT AND AT SUCH A TEMPERATURE THAT THE PARTIAL PRESSURE OF HYDROGEN FLUORIDE OVER THE SCRUBBING MIXTURE OF POTASSIUM FLUORIDE AND HYDROGEN FLUORIDE IS LESS THAN THE PARTIAL PRESSURE OF HYDROGEN FLUORIDE IN THE EVOLVED FLUORINE, AND SUBSEQUENTLY RETURNING THE HYDROGEN FLUORIDE IN THE SCRUBBING MIXTURE, AFTER CONTACT WITH THE CONTAMINATED FLUORINE, TO THE CELL.
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR THE MANUFACTURE OF FLUORINE BY THE ELECTORYSIS OF A MOLTEN MIXTURE OF POTASSIUM FLOURIDE AND HYDROGEN FLUORIDE IN AN ELECTROLYTIC CELL THEREIN HYDROGEN FLUORIDE IN THE EVOLVED FLUORINE IS REMOVED, THE IMPROVED METHOD OF REMOVING SAID HYDROGEN FLUORIDE FROM SAID EVOLVED FLUORINE COMPRISING SCRUBBING THE FLUORINE COMTAMINATED WITH HYDROGEN FLUORIDE WITH A MOLTEN MIXTURE OF POTASSIUM FLUORIDE AND HYDROGEN FLUORIDE WHICH IS OF SUCH A HYDROGEN CONTENT AND AT SUCH A TEMPERATURE THAT THE PARTIAL PRESSURE OF HYDROGEN FLUORIDE OVER THE SCRUBBING MIXTURE OF POTASSIUM FLUORIDE AND HYDROGEN FLUORIDE IS LESS THAN THE PARTIAL PRESSURE OF HYDROGEN FLUORIDE IN THE EVOLVED FLUORINE, AND SUBSEQUENTLY RETURNING THE HYDROGEN FLUORIDE IN THE SCRUBBING MIXTURE, AFTER CONTACT WITH THE CONTAMINATED FLUORINE, TO THE CELL.
References Cited (Backward Citations)
US857927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |