US3342558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical measuring system utilizing a fuel cell
Assignee: Phillips Petroleum Co
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Filing: 1962-04-18
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Granted: 1967-09-19
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Expires: 1982-04-18
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Reinecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:28
CPC Classifications
H; H01; H01M; H01M8/00; G; G01; G01B; G01B7/00; G01B7/001; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/49; G01N30/00; G01N30/02; G01N30/62; G01N30/64
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A METHOD OF DETECTING THE PRESENCE OF COMBUSTIBLE GASES IN A FLUID THE COMPOSITION OF WHICH CAN VARY DUE TO THE PRESENCE OF SAID COMBUSTIBLE GASES, COMPRISING SUPPLYING A SAMPLE OF SAID FLUID TO THE FUEL ELECTRODE OF A FUEL CELL, SUPPLYING AN OXIDANT TO THE OXIDANT ELECTRODE OF SAID FUEL CELL, AND MEASURING THE ELECTRICAL OUTPUT BETWEEN SAID FUEL ELECTRODE AND SAID OXIDANT ELECTRODE, WHEREBY AN INCREASE IN SAID ELECTRICAL OUTPUT IS INDICATIVE OF THE PRESENCE OFCOMBUSTIBLE GASES IN SAID FLUID.
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |