US3148089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen-purification device for use in fuel cell
Assignee: Leesona Corp
•
Filing: 1960-08-24
•
Granted: 1964-09-08
•
Expires: 1980-08-24
Abstract
No abstract record available.
Inventors
- 👤 Harry G Oswin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/94; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A FUEL CELL, A HYDROGEN DIFFUSION ELECTRODE STRUCTURE IN COMBINATION WITH A HYDROCARBON REFORMING UNIT, SAID ELECTRODE STRUCTURE BEING COMPOSED OF INTERNAL AND EXTERNAL TUBES, THE INTERNAL TUBE CARRYING HYDROGEN AND GASEOUS IMPURITIES UNDER PRESSURE FROM THE REFORMING UNIT AND DIFFUSING HYDROGEN INTO THE EXTERNAL TUBE, SAID EXTERNAL TUBE IN COMBINATION WITH THE INTERNAL TUBE FORMING THE FUEL GAS COMPARTMENT AND BEING THE FUEL ELECTORDE OF THE FUEL CELL, THE PRESSURE OF THE GAS BETWEEN THE INTERNAL AND EXTERNAL NON-POROUS TUBES BEING MAINTAINED AT A LOWER PRESSURE THAN IN THE INTERNAL TUBE, SAID NON-POROUS TUBES BEING MEMBERS OF THE GROUP CONSISTING OF PALLADIUM AND PALLADIUM-SILVER ALLOYS CONTAINING FROM 5-40% BY WEIGHT SILVER.
Claim 2
Dependent Claim
113 words
IN A FUEL CELL, A HYDROGEN DIFFUSION ELECTRODE STRUCTURE IN COMBINATION WITH A HYDROCARBON REFORMING UNIT, SAID ELECTRODE STRUCTURE BEING COMPOSED OF INTERNAL AND EXTERNAL TUBES, THE INTERNAL TUBE CARRYING HYDROGEN AND GASEOUS IMPURITIES UNDER PRESSURE FROM THE REFORMING UNIT AND DIFFUSING HYDROGEN INTO THE EXTERNAL TUBE, SAID EXTERNAL TUBE IN COMBINATION WITH THE INTERNAL TUBE FORMING THE FUEL GAS COMPARTMENT AND BEING THE FUEL ELECTORDE OF THE FUEL CELL, THE PRESSURE OF THE GAS BETWEEN THE INTERNAL AND EXTERNAL NON-POROUS TUBES BEING MAINTAINED AT A LOWER PRESSURE THAN IN THE INTERNAL TUBE, SAID NON-POROUS TUBES BEING MEMBERS OF THE GROUP CONSISTING OF PALLADIUM AND PALLADIUM-SILVER ALLOYS CONTAINING FROM 5-40% BY WEIGHT SILVER.
References Cited (Backward Citations)
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US1182759A
Cited
US2175523A
Cited
US2384463A
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US2901523A
Cited
US2913511A
Cited
US2860175A
Cited
US3020327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |