US3297490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing catalyst support and product thereof
Assignee: Wyeth Holdings LLC
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Filing: 1963-03-01
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Granted: 1967-01-10
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Barber William Austin
- 👤 Haldeman Robert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:55
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN AN IMPROVED PROCESS FOR PREPARING AN ELECTRODE ADAPTED FRO USE IN A HYDROGEN OXYGEN CONTAINING GAS FUEL CELL COMPRISING CONDUCTIVE FILLER AND CATALYTIC AMOUNTS OF AN ACTIVE METAL DISPERSED THEREON, THE IMPROVEMENT WHICH COMPRISES; INCORPORATING SAID CATALYST INTO CONDUCTIVE FILLER, SAID FILLER BEING (A) PREPARED FROM A NITROGEN-CARBON POLYMER PROLYZED AT TEMPERATURES ABOVE ABOUT 700*C. FOR FROM ONE-HALF HOUR TO ABOUT ONE HOUR, AND (B) SAID CONDUCTIVE FILLER CONTAINING A MAJOR AMOUNT OF CARBON AND A MINOR AMOUNT OF NITROGEN; AND THEREAFTER FORMING AN ELECTRODE OF ENHANCED PERFORMANCE AT HIGH CURRENT DENSITIES AND VOLTAGES.
Claim 2
Dependent Claim
95 words
IN AN IMPROVED PROCESS FOR PREPARING AN ELECTRODE ADAPTED FRO USE IN A HYDROGEN OXYGEN CONTAINING GAS FUEL CELL COMPRISING CONDUCTIVE FILLER AND CATALYTIC AMOUNTS OF AN ACTIVE METAL DISPERSED THEREON, THE IMPROVEMENT WHICH COMPRISES; INCORPORATING SAID CATALYST INTO CONDUCTIVE FILLER, SAID FILLER BEING (A) PREPARED FROM A NITROGEN-CARBON POLYMER PROLYZED AT TEMPERATURES ABOVE ABOUT 700*C. FOR FROM ONE-HALF HOUR TO ABOUT ONE HOUR, AND (B) SAID CONDUCTIVE FILLER CONTAINING A MAJOR AMOUNT OF CARBON AND A MINOR AMOUNT OF NITROGEN; AND THEREAFTER FORMING AN ELECTRODE OF ENHANCED PERFORMANCE AT HIGH CURRENT DENSITIES AND VOLTAGES.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |