Patent US3425873A successfully refreshed from Google Patents.
US3425873A
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Process of automatically controlling fuel concentration in fuel cell
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-12-19
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Granted: 1969-02-04
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles H Worsham
- 👤 Duane G Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:48
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04082; H01M8/04186; H01M8/04194; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD OF CONTROLLING THE FUEL CONCENTRATION IN A FUEL CELL EMPLOYING AN AQUEOUS ELECTROLYTE AND A LIQUID CARBONACEOUS FUEL WHICH COMPRISES CONDENSING THE EXHAUST GASES FROM SAID CELL, SAID GASES COMPRISING ESSENTIALLY CARBON DIOXIDE, WATER VAPOR AND VAPORIZED CAR-
Claim 2
Independent Claim
40 words
A METHOD OF CONTROLLING THE FUEL CONCENTRATION IN A FUEL CELL EMPLOYING AN AQUEOUS ELECTROLYTE AND A LIQUID CARBONACEOUS FUEL WHICH COMPRISES CONDENSING THE EXHAUST GASES FROM SAID CELL, SAID GASES COMPRISING ESSENTIALLY CARBON DIOXIDE, WATER VAPOR AND VAPORIZED CAR-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |