US3687724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic anode
Assignee: Engelhard Minerals and Chemicals Corp
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Filing: 1971-03-05
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Granted: 1972-08-29
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Expires: 1991-03-05
Abstract
Abstract AN IMPROVED ANODE FOR ELECTROLYSIS OF BRINE IS COMPRISED OF A CORROSION RESISTANT VALVE METAL SUBSTRATE AND A THIN ADHERENT EXTERIOR COATING CONSISTING ESSENTIALLY 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
- 👤 Carl D Keith
- 👤 Alfred J Haley Jr
- 👤 Robert M Kero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:16
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C08G65/14; C08G65/22; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |