US3755107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic anode
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1969-11-21
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Granted: 1973-08-28
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Expires: 1989-11-21
Abstract
Abstract An improved anode for the electrolysis of brine is comprised of a corrosion resistant valve metal substrate and a thin adherent exterior coating consisting esentially of ruthenium oxide and a carbide, the carbide being inert to the electrolysis environment. An especially effective anode has a coating of ruthenium oxide and boron carbide.
Inventors
- 👤 C Keith
- 👤 A Haley
- 👤 R Kero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:54
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C08G65/14; C08G65/22; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
An anode of claim 1 wherein the thin coating is composed of 5 to 90% ruthenium oxide and 10 to 95% of the silicon carbide.
Claim 2
Dependent Claim
40 words
An electrolytic cell comprised of a mercury cathode and an anode comprised of a corrosion resistant valve metal substrate and a thin adherent coating consisting essentially of ruthenium oxide and silicon carbide, said carbide being inert to the cell environment.
Claim 3
Dependent Claim
78 words
In the electrolysis of an aqueous alkali metal chloride solution in a cell having a platinum group metal anode by a process comprising contacting said solution with the anode and electrolyzing said alkali metal chloride solution by passing a current through said solution, the improvement wherein said anode is comprised of a corrosion resistant valve metal substrate and a thin adherent coating consisting essentially of ruthenium oxide and silicon carbide, said carbide being inert to the cell environment.
Claim 4
Dependent Claim
12 words
A process of claim 4 wherein the cathode is comprised of mercury.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |