US3354060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the formation of a fuel cell electrode containing an intimate mixture ofplatinum and a second metal
Assignee: Standard Oil Co
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Filing: 1963-07-31
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Granted: 1967-11-21
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Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:31
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PREPARING A PLATINUM ELECTRODE EXHIBITING A LOW ACTIVATION POLARIZATION, SAID ELECTRODE COMPRISING A PREDOMINANTLY PLATINUM LAYER CONTAINING AN INTIMATE MIXTURE OF PLATINUM AND COPPER ON A POROUS ELECTRODE SUPPORT, WHICH PROCESS COMPRISES FORMING SAID IMTIMATE MIXTURE BY THE ELECTROLYTIC COMDEPOSITION OF SAID PLATINUM AND SAID COPPER ON SAID SUPPORT, AND REMOVING A PORTION OF SAID COPPER FORM SAID PLATINUM LAYER TO INCREASE THE INTERNAL SURFACE AREA OF SAID PLATINUM LAYER AND EXPOSE ADDITIONAL AMOUNTS OF SAID INTIMATE MIXTURE.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PREPARING A PLATINUM ELECTRODE EXHIBITING A LOW ACTIVATION POLARIZATION, SAID ELECTRODE COMPRISING A PREDOMINANTLY PLATINUM LAYER CONTAINING AN INTIMATE MIXTURE OF PLATINUM AND COPPER ON A POROUS ELECTRODE SUPPORT, WHICH PROCESS COMPRISES FORMING SAID IMTIMATE MIXTURE BY THE ELECTROLYTIC COMDEPOSITION OF SAID PLATINUM AND SAID COPPER ON SAID SUPPORT, AND REMOVING A PORTION OF SAID COPPER FORM SAID PLATINUM LAYER TO INCREASE THE INTERNAL SURFACE AREA OF SAID PLATINUM LAYER AND EXPOSE ADDITIONAL AMOUNTS OF SAID INTIMATE MIXTURE.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |