Patent US2534638A successfully refreshed from Google Patents.
US2534638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic production of fluorine
Assignee: Harshaw Chemical Co
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Filing: 1949-02-08
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Granted: 1950-12-19
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Expires: 1969-02-08
Abstract
No abstract record available.
Inventors
- 👤 Carl F Swinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:45
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS OF GENERATING FLUORINE COMPRISING PASSING CURRENT THROUGH AN ELECTROLYTE COMPRISING KF AND HF AND CONTAINING FROM .005% TO .01% BASED UPON THE HF CONTENT, OF WATER AS AN IMPURITY BETWEEN A CARBON ANODE AND A CATHODE, SAID ANODE BEING INITIALLY COATED WITH A THIN COATING OF METALLIC NICKEL, AND CONTINUING TO PASS CURRENT BETWEEN SAID ANODE AND CATHODE AFTER SAID COATING OF METALLIC NICKEL HAS DISINTEGRATED.
Claim 2
Dependent Claim
68 words
A PROCESS OF GENERATING FLUORINE COMPRISING PASSING CURRENT THROUGH AN ELECTROLYTE COMPRISING KF AND HF AND CONTAINING FROM .005% TO .01% BASED UPON THE HF CONTENT, OF WATER AS AN IMPURITY BETWEEN A CARBON ANODE AND A CATHODE, SAID ANODE BEING INITIALLY COATED WITH A THIN COATING OF METALLIC NICKEL, AND CONTINUING TO PASS CURRENT BETWEEN SAID ANODE AND CATHODE AFTER SAID COATING OF METALLIC NICKEL HAS DISINTEGRATED.
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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |