US4285797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode for the electrolytic treatment of alkali halide
Assignee: Kureha Corp
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Filing: 1979-05-23
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Granted: 1981-08-25
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Expires: 1999-05-23
Abstract
Abstract The invention relates to cathodic electrodes for use in the electrolytic treatment of alkali halide. The electrode has a substantial mass of copper or copper alloy, and the surface of the mass is roughened and activated by blasting solid and abrasive particles against the mass surface. The roughened surface is then coated with a rhodium or rhodium alloy layer. The effect is a substantial reduction of hydrogen superpotential value.
Inventors
- 👤 Masakatsu Wagu
- 👤 Makoto Fukuda
- 👤 Shirou Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:53
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/081; C25B11/091; C25B11/097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A cathode electrode for use in the electrolysis of alkali halide, said cathode electrode comprising a mass of one of copper and copper alloy subjected to mechanical grinding by blasting with solid particles of 0.1-1,000 microns in their particle sizes so as to achieve a mechanically ground surface, the latter being coated with one of rhodium and rhodium alloy coated layer.
Claim 2
Dependent Claim
61 words
A cathode electrode for use in the electrolysis of alkali halide, said cathode electrode comprising a mass of one of copper and copper alloy subjected to mechanical grinding by blasting with solid particles of 0.1-1,000 microns in their particle sizes so as to achieve a mechanically ground surface, the latter being coated with one of rhodium and rhodium alloy coated layer.
References Cited (Backward Citations)
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US3250646A
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US3515651A
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US3528895A
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US4097347A
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US4157943A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |