US4568568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode for electrolyzing acid solutions and process for producing the same
Assignee: De Nora Permelec Ltd
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Filing: 1985-01-03
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Granted: 1986-02-04
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Expires: 2005-01-03
Abstract
Abstract A cathode for electrolyzing acid solutions which comprises an electrically conductive metal substrate, a spray coated layer of a cathode active material containing tungsten, tungsten carbide or a mixture thereof in an amount of 10% by weight or more on the substrate, and an impregnation coated layer of 1 g/m 2 or more of an acid-resistant fluorine containing resin on the outside surface of the coated layer of cathode active material, and a process for producing such.
Inventors
- 👤 Hiroshi Asano
- 👤 Takayuki Shimamune
- 👤 Toshiki Goto
- 👤 Masashi Hosonuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/095; C25B11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A process for producing a cathode for electrolyzing acid solutions which comprises: forming a spray coated layer of a cathode active material on an electrically conductive metal substrate by spray coating a powder containing about 10% by weight or more of tungsten, tungsten carbide or a mixture thereof; impregnating, without using pore forming agents, the outside surface area of the coated layer with an acid-resistant fluorine containing resin in an amount of about 1 g/m 2 or more so as to leave exposed portions of said cathode active material heating said material thus produced at a temperature of 300° to 400° C.; and solidifying said resin on said material.
Claim 2
Dependent Claim
109 words
A process for producing a cathode for electrolyzing acid solutions which comprises: forming a spray coated layer of a cathode active material on an electrically conductive metal substrate by spray coating a powder containing about 10% by weight or more of tungsten, tungsten carbide or a mixture thereof; impregnating, without using pore forming agents, the outside surface area of the coated layer with an acid-resistant fluorine containing resin in an amount of about 1 g/m 2 or more so as to leave exposed portions of said cathode active material heating said material thus produced at a temperature of 300° to 400° C.; and solidifying said resin on said material.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein said coating layer is formed by plasma spray coating or flame spray coating.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein said process includes coating said spray coated layer with at least one platinum group metal or an oxide thereof.
References Cited (Backward Citations)
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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) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |