Patent US5203972A successfully refreshed from Google Patents.
US5203972A
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US
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Method for electrolytic ozone generation and apparatus therefor
Assignee: De Nora Permelec Ltd
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Filing: 1991-11-26
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Granted: 1993-04-20
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Expires: 2011-11-26
Abstract
Abstract A method and apparatus for electrolytic ozone generation are described which process comprises feeding raw water to an ozone-generating electrolytic cell partitioned into an anode chamber and a cathode chamber by means of a solid electrolyte, said feeding of raw water being only to the cathode chamber, and conducting electrolysis to thereby produce ozone in the anode chamber.
Inventors
- 👤 Takayuki Shimamune
- 👤 Isao Sawamoto
- 👤 Yoshinori Nishiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/13; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/467; C02F1/4672; C02F1/42; C02F1/72; C02F1/78; C02F2201/00; C02F2201/78; C02F2201/782
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
A method for electrolytic ozone generation which comprises feeding raw water to an ozone-generating electrolytic cell partitioned into an anode chamber and a cathode chamber by means of a solid electrolyte, said feeding of raw water being only to the cathode chamber, and conducting electrolysis to thereby produce ozone in the anode chamber.
Claim 2
Independent Claim
53 words
A method for electrolytic ozone generation which comprises feeding raw water to an ozone-generating electrolytic cell partitioned into an anode chamber and a cathode chamber by means of a solid electrolyte, said feeding of raw water being only to the cathode chamber, and conducting electrolysis to thereby produce ozone in the anode chamber.
Claim 3
Dependent Claim
21 words
A method for electrolytic ozone generation as in claim 1, wherein the solid electrolyte is a cation permeable ion exchange membrane.
Claim 4
Dependent Claim
22 words
A method for electrolytic ozone generation as in claim 2, wherein the ion exchange membrane is a perfluorocarbonsulfonic acid-based ion exchange membrane.
Claim 5
Dependent Claim
17 words
A method for electrolytic ozone generation as in claim 2, wherein the anode chamber is ozone resistant.
Claim 6
Dependent Claim
37 words
A method for electrolytic ozone generation as in claim 1, wherein the electrolysis conditions comprise a current density of approximately 50-150 A/dm 2 , cell voltage of about 3.0-3.5 V, and liquid temperature of about 25°-35° C.
Claim 7
Dependent Claim
23 words
A method for electrolytic ozone generation as in claim 1, wherein raw water is deionized before it is fed into the cathode chamber.
Claim 8
Dependent Claim
51 words
An electrolytic ozone generator which comprises an ozone generating electrolytic cell partitioned by a solid electrolyte into a cathode chamber and an anode chamber, said cathode chamber being connected to a gas liquid separating column, and a raw water feed opening is provided and is connected only to said cathode chamber.
Claim 9
Dependent Claim
51 words
An electrolytic ozone generator which comprises an ozone generating electrolytic cell partitioned by a solid electrolyte into a cathode chamber and an anode chamber, said cathode chamber being connected to a gas liquid separating column, and a raw water feed opening is provided and is connected only to said cathode chamber.
Claim 10
Dependent Claim
22 words
An electrolytic ozone generator as in claim 7, wherein the solid electrolyte is an ion exchange membrane of the perfluorcarbonsulfonic acid type.
Claim 11
Dependent Claim
43 words
An electrolytic ozone generator as in claim 7, wherein the cathode chamber and the gas liquid separating column are connected with each other at their upper parts by a hydrogen withdrawal opening and at their lower parts by a raw water feed opening.
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) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |