US3684579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a tungsten carbide containing electrode for fuel elements
Assignee: Individual
•
Filing: 1970-07-21
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Granted: 1972-08-15
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Expires: 1990-07-21
Abstract
Abstract PROCESS FOR MAKING A WC CONTAINING ELECTRODE FOR FUEL CELL ELEMENTS. A SILVER TUNGSTATE IS REDUCED AT ELEVATED TEMPERATURE IN A HYDROGEN ATMOSPHERE. IT IS THEREAFTER CARBURATED. FINALLY, AN ELECTRODE IS FORMED OF THE THUS PRODUCED SILVER CONTAINING TUNGSTEN CARBIDE.
Inventors
- 👤 Konrad Mund
- 👤 Rolf-Winfried Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:07
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |