Patent US4975171A successfully refreshed from Google Patents.
US4975171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar electrolytic cell
Assignee: De Nora Permelec Ltd
•
Filing: 1989-05-10
•
Granted: 1990-12-04
•
Expires: 2009-05-10
Abstract
Abstract A bipolar-electrode type electrolytic cell for production of ozone is disclosed, including a plurality of solid electrolyte electrodes comprising a solid electrolyte ion exchange membrane having provided on opposing sides thereof an anode and a cathode, said electrodes positioned to form a plurality of electrode compartments between adjacent solid electrolyte electrodes, such that the anodes face each other to form anode compartments and the cathodes face each other to form cathode compartments, and between the side walls of the electrolytic cell and the solid electrolyte electrodes positioned closest to the cell side walls, wherein each of the anodes and the cathodes provided on the solid electrolyte electrodes are electrically connected to a different-polar electrode, respectively, which face the same direction and are present on adjacent solid electrolyte electrodes.
Inventors
- 👤 Yoshinori Nishiki
- 👤 Isao Sawamoto
- 👤 Nakamatsu Shunji
- 👤 Takayuki Shimamune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:57
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/60; C25B9/65; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C25B1/00; C25B1/01; C25B1/02; C25B1/04; C25B9/70; C02F1/72; C02F1/78; C02F2001/46128; C02F2001/46133; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2201/46195
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A bipolar-electrode type electrolytic cell including a plurality of solid electrolyte electrodes comprising a solid electrolyte ion exchange membrane having provided on opposing sides thereof an anode and a cathode, said electrodes positioned to form a plurality of electrode compartments comprising at least one mid-compartment defined between adjacent solid electrolyte electrodes such that the anodes face each other to form anode compartments and the cathodes face each other to form cathode compartments and two edge compartments defined between the side walls of the electrolytic cell and the solid electrolyte electrodes positioned closest to the cell side walls, wherein each of the anodes and the cathodes provided on the solid electrolyte electrodes are electrically connected to a different-polar electrode, respectively, which face the same direction and are present on adjacent solid electrolyte electrodes.
Claim 2
Dependent Claim
132 words
A bipolar-electrode type electrolytic cell including a plurality of solid electrolyte electrodes comprising a solid electrolyte ion exchange membrane having provided on opposing sides thereof an anode and a cathode, said electrodes positioned to form a plurality of electrode compartments comprising at least one mid-compartment defined between adjacent solid electrolyte electrodes such that the anodes face each other to form anode compartments and the cathodes face each other to form cathode compartments and two edge compartments defined between the side walls of the electrolytic cell and the solid electrolyte electrodes positioned closest to the cell side walls, wherein each of the anodes and the cathodes provided on the solid electrolyte electrodes are electrically connected to a different-polar electrode, respectively, which face the same direction and are present on adjacent solid electrolyte electrodes.
Claim 3
Dependent Claim
37 words
An electrolytic cell as in claim 1, wherein the ion exchange membrane is a perfluorosulfonic acid-based membrane, and an anode substance of the anode is lead dioxide or a substance containing lead dioxide as a main component.
Claim 4
Dependent Claim
22 words
An electrolytic cell as in claim 1, further comprising an electrolytic solution contained in the electrode compartments, said electrolytic solution being circulated.
Claim 5
Dependent Claim
17 words
An electrolytic cell as in claim 1, further comprising a water jacket provided in the electrode compartments.
Claim 6
Dependent Claim
57 words
An electrolytic cell as in claim 1, wherein the distance between said solid electrolyte electrodes is sufficiently large such that the extent of an electrolytic reaction occurring between same-polar electrodes within the same compartment is negligible as compared to an electrolytic reaction occurring between different-polar electrodes provided on opposing sides of the solid electrolyte ion exchange membrane.
Claim 7
Dependent Claim
40 words
An electrolytic cell as in claim 5, further comprising water as, an electrolytic liquid wherein a product of oxygen gas containing ozone gas is mainly formed in the anode compartments and hydrogen gas is mainly formed in the cathode compartments.
Claim 8
Dependent Claim
25 words
An electrolytic cell as in claim 6, wherein a product gas containing not more than 2.5 vol % hydrogen is formed in the anode compartments.
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) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |