US4375395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing ozone
Assignee: University of California
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Filing: 1981-05-21
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Granted: 1983-03-01
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Expires: 2001-05-21
Abstract
Abstract In electrolytic cells for producing ozone, the ozone current efficiencies can be enhanced by providing electrodes, and especially anodes, fabricated from glassy carbon. Cells including such glassy carbon electrodes are capable of producing ozone at very high current efficiencies utilizing aqueous electrolytes of highly electronegative fluoro-anions.
Inventors
- 👤 Peter C. Foller
- 👤 Mark L. Goodwin
- 👤 Charles W. Tobias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:30
CPC Classifications
C; C25; C25B; C25B1/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A method for producing ozone at high current efficiencies from an electrolytic cell comprising passing an electric current at high oxygen overvoltages through a bare glassy carbon anode and a cathode into an electrolyte comprising a strongly acidic aqueous solution of highly electronegative BF 4 - fluoro-anions.
Claim 2
Independent Claim
47 words
A method for producing ozone at high current efficiencies from an electrolytic cell comprising passing an electric current at high oxygen overvoltages through a bare glassy carbon anode and a cathode into an electrolyte comprising a strongly acidic aqueous solution of highly electronegative BF 4 - fluoro-anions.
Claim 3
Independent Claim
47 words
A method for producing ozone at high current efficiency from an electrolytic cell comprising passing an electric current at high oxygen overvoltages through a bare glassy carbon anode and a cathode into an electrolyte comprising a strongly acidic aqueous solution of highly electronegative PF 6 - fluoro-anions.
Claim 4
Independent Claim
47 words
A method for producing ozone at high current efficiency from an electrolytic cell comprising passing an electric current at high oxygen overvoltages through a bare glassy carbon anode and a cathode into an electrolyte comprising a strongly acidic aqueous solution of highly electronegative PF 6 - fluoro-anions.
References Cited (Backward Citations)
US3256164A
Cited
US4235695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |