US3311508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of activating platinum or palladium containing electrode
Assignee: Union Oil Company of California
•
Filing: 1965-08-19
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Granted: 1967-03-28
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Expires: 1985-08-19
Abstract
No abstract record available.
Inventors
- 👤 Royce E Biddick
- 👤 William G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8828; H01M4/8835; H01M4/8842; H01M4/8878; H01M4/8896; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF CHEMICALLY ACTIVATING AN ELECTROCHEMICAL TRANSITION METAL CATALYST SELECTED FROM PLATINUM AND PALLADIUM BONDED WITHIN AN ELECTODE FOR USE IN A FUEL CELL CONSISTING ESSENTIALLY OF EXPOSING THE ELECTRODE TO AN ATMOSPHERE CONSISTING PRINCIPALLY OF HYDROGEN, AT AMBIENT TEMPERATURE, FOR A TIME SUFFICIENT OT INCREASE THE ELECTROCHEMICAL ACTIVITY OF SAID TRANSITION METAL AND THEREAFTER SUBJECTING THE ELECTRODE TO AN INERT ATMOSPHERE TO REMOVE ALL TRACES OF FREE HYDROGEN BEFORE EXPOSING THE ELECTRODE TO OXYGEN-CONTAINING ATMOSPHERES.
Claim 2
Independent Claim
77 words
THE METHOD OF CHEMICALLY ACTIVATING AN ELECTROCHEMICAL TRANSITION METAL CATALYST SELECTED FROM PLATINUM AND PALLADIUM BONDED WITHIN AN ELECTODE FOR USE IN A FUEL CELL CONSISTING ESSENTIALLY OF EXPOSING THE ELECTRODE TO AN ATMOSPHERE CONSISTING PRINCIPALLY OF HYDROGEN, AT AMBIENT TEMPERATURE, FOR A TIME SUFFICIENT OT INCREASE THE ELECTROCHEMICAL ACTIVITY OF SAID TRANSITION METAL AND THEREAFTER SUBJECTING THE ELECTRODE TO AN INERT ATMOSPHERE TO REMOVE ALL TRACES OF FREE HYDROGEN BEFORE EXPOSING THE ELECTRODE TO OXYGEN-CONTAINING ATMOSPHERES.
References Cited (Backward Citations)
US2381677A
Cited
US3117034A
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US3212936A
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US3212930A
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US3203834A
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US3183123A
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |