Patent US3239383A successfully refreshed from Google Patents.
US3239383A
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Fuel cell process
Assignee: Engelhard Industries Inc
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Filing: 1961-08-15
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Granted: 1966-03-08
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Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 Anna P Hauel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:33
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A METHOD FOR OPERATING A FUEL CELL HAVING A PLATINUM GROUP METAL CATHODE CATALYST AND AN ELECTROLYTE CONTAINING NO FREE BASE WHEREIN THE ELECTROCHEMICAL OXIDATION OF A FUEL IS EFFECTED BY INTRODUCING AN OXIDANT COMPRISING OXYGEN-CONTAINING GAS NORMALLY INCLUDING A CONNATE CARBON DIOXIDE IMPURITY INTO CONTACT WITH SAID CATHODE AND ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES REMOVING SAID CARBON DIOXIDE FROM THE SAID OXYGENCONTAINING GAS PRIOR TO SUCH CONTACTING.
Claim 2
Dependent Claim
69 words
IN A METHOD FOR OPERATING A FUEL CELL HAVING A PLATINUM GROUP METAL CATHODE CATALYST AND AN ELECTROLYTE CONTAINING NO FREE BASE WHEREIN THE ELECTROCHEMICAL OXIDATION OF A FUEL IS EFFECTED BY INTRODUCING AN OXIDANT COMPRISING OXYGEN-CONTAINING GAS NORMALLY INCLUDING A CONNATE CARBON DIOXIDE IMPURITY INTO CONTACT WITH SAID CATHODE AND ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES REMOVING SAID CARBON DIOXIDE FROM THE SAID OXYGENCONTAINING GAS PRIOR TO SUCH CONTACTING.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |