Patent US3274031A successfully refreshed from Google Patents.
US3274031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell electrode and methods of preparation
Assignee: General Electric Co
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Filing: 1963-08-07
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Granted: 1966-09-20
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Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Henri J R Maget
- 👤 Wheeler Gerald Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:41
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A FUEL CELL ELECTRODE FORMED OF A PLURALITY OF CATALYST PARTICLES CONSISTING ESSENTIALLY OF TITANIUM AND AT LEAST ONE NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, IRIDIUM, AND RHODIUM, EACH OF SAID PARTICLES HAVING A PLURALITY OF ASPERITIES FORMED IN THE SURFACE THEREOF BY THE REMOVAL OF A PORTION OF SAID TITANIUM, SAID ASPERITIES CONTAINING A PREDOMINANT AMOUNT OF SAID NOBLE METAL IN AN ACTIVE CONDITION, SAID PARTICLES PRIOR TO THE FORMATION OF SAID ASPERITIES, CONSISTING ESSENTIALLY OF FROM 4-25% OF AT LEAST ONE OF SAID NOBLE METALS AND THE REMAINDER TITANIUM,
Claim 2
Dependent Claim
95 words
A FUEL CELL ELECTRODE FORMED OF A PLURALITY OF CATALYST PARTICLES CONSISTING ESSENTIALLY OF TITANIUM AND AT LEAST ONE NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, IRIDIUM, AND RHODIUM, EACH OF SAID PARTICLES HAVING A PLURALITY OF ASPERITIES FORMED IN THE SURFACE THEREOF BY THE REMOVAL OF A PORTION OF SAID TITANIUM, SAID ASPERITIES CONTAINING A PREDOMINANT AMOUNT OF SAID NOBLE METAL IN AN ACTIVE CONDITION, SAID PARTICLES PRIOR TO THE FORMATION OF SAID ASPERITIES, CONSISTING ESSENTIALLY OF FROM 4-25% OF AT LEAST ONE OF SAID NOBLE METALS AND THE REMAINDER TITANIUM,
Claim 3
Independent Claim
101 words
A METHOD FOR FORMING A CATALYTIC FUEL CELL ELECTRODE INCLUDING: (1) PREPARING AN ALLOY CONSISTING ESSENTIALLY OF FROM 4-25% OF AT LEAST ONE NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, IRIDIUM, AND RHODIUM AND THE REMAINDER TITANIUM, (2) FORMING SAID ALLOY INTO PARTICLES, (3) ETCHING THE SURFACE OF SAID PARTICLES WITH HYDROFLUORIC ACID TO REMOVE AT LEAST A PORTION OF SAID TITANIUM FROM SAID SURFACE SO AS TO PRODUCE A PLURALITY OF ASPERITIES CONTAINING A PREDOMINANT AMOUNT OF SAID NOBLE METAL IN AN ACTIVE CONDITION, AND (4) BINDING THE PARTICLES WITH POLYTETRAFLUOROETHYLENE FILM TO FORM AN ELECTRODE STRUCTURE.
Claim 4
Independent Claim
101 words
A METHOD FOR FORMING A CATALYTIC FUEL CELL ELECTRODE INCLUDING: (1) PREPARING AN ALLOY CONSISTING ESSENTIALLY OF FROM 4-25% OF AT LEAST ONE NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM, IRIDIUM, AND RHODIUM AND THE REMAINDER TITANIUM, (2) FORMING SAID ALLOY INTO PARTICLES, (3) ETCHING THE SURFACE OF SAID PARTICLES WITH HYDROFLUORIC ACID TO REMOVE AT LEAST A PORTION OF SAID TITANIUM FROM SAID SURFACE SO AS TO PRODUCE A PLURALITY OF ASPERITIES CONTAINING A PREDOMINANT AMOUNT OF SAID NOBLE METAL IN AN ACTIVE CONDITION, AND (4) BINDING THE PARTICLES WITH POLYTETRAFLUOROETHYLENE FILM TO FORM AN ELECTRODE STRUCTURE.
References Cited (Backward Citations)
US2641623A
Cited
US2824165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |