Patent US3250646A successfully refreshed from Google Patents.
US3250646A
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US
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Fuel cell electrode
Assignee: Allis Chalmers Corp
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Filing: 1960-08-16
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Granted: 1966-05-10
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Expires: 1980-08-16
Abstract
No abstract record available.
Inventors
- 👤 Allen J Hipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; H01M4/8621; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN ELECTRODE FOR USE IN FUEL CELLS AND LIKE APPARATUS COMPRISING: A POROUS NICKEL PLAQUE HAVING SPACED OPPOSITELY FACED SURFACES, AT LEAST ONE OF SAID SURFACES HAVING A PLURALITY OF ACTIVE CENTERS OF PRIMARY AND SECONDARY ORIGIN DEFINED THEREIN; AND SUBSTANTIALLY MONOMOLECULAR RANDOMLY DISTINCT DEPOSITS OF PLATINUM AND ANOTHER CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, IRIDIUM, RHODIUM, OSMIUM AND RUTHENIUM UPON SAID SURFACE AND SAID PRIMARY AND SECONDARY ORIGIN ACTIVE CENTERS, SAID CATALYTIC DEPOSITS BEING MUTUALLY EXCLUSIVE AND CONSISTING OF 10-20% PLATINUM AND THE REMAINDER A CATALYST SELECTED FROM SAID GROUP.
Claim 2
Dependent Claim
93 words
AN ELECTRODE FOR USE IN FUEL CELLS AND LIKE APPARATUS COMPRISING: A POROUS NICKEL PLAQUE HAVING SPACED OPPOSITELY FACED SURFACES, AT LEAST ONE OF SAID SURFACES HAVING A PLURALITY OF ACTIVE CENTERS OF PRIMARY AND SECONDARY ORIGIN DEFINED THEREIN; AND SUBSTANTIALLY MONOMOLECULAR RANDOMLY DISTINCT DEPOSITS OF PLATINUM AND ANOTHER CATALYST SELECTED FROM THE GROUP CONSISTING OF PALLADIUM, IRIDIUM, RHODIUM, OSMIUM AND RUTHENIUM UPON SAID SURFACE AND SAID PRIMARY AND SECONDARY ORIGIN ACTIVE CENTERS, SAID CATALYTIC DEPOSITS BEING MUTUALLY EXCLUSIVE AND CONSISTING OF 10-20% PLATINUM AND THE REMAINDER A CATALYST SELECTED FROM SAID GROUP.
References Cited (Backward Citations)
US1243111A
Cited
US2384463A
Cited
US2409295A
Cited
US2690402A
Cited
US2860175A
Cited
US2955959A
Cited
GB874283A
Cited
US3110622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |