Patent US3281275A successfully refreshed from Google Patents.
US3281275A
Expired / Lapsed
US
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Fuel cell comprising metal screen electrodes
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-10-29
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Granted: 1966-10-25
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Duane G Levine
- 👤 Charles H Worsham
- 👤 Barry L Tarmy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/08; H01M8/02; H01M8/0289; H01M8/18; H01M8/22; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
IN A FUEL CELL COMPRISING AN ANODE AND A CATHODE THE IMPROVEMENT COMPRISING IN COMBINATION A CATALYST COATED WIRE SCREEN NONSACRIFICIAL ELECTRODE AND A POROUS ELECTRONICALLY INSULATIVE MEMBRANE IN CONTACT WITH SAID ELECTRODE, SAID ELECTRODE HAVING A RATIO OF ACTUAL SURFACE AREA TO APPARENT SURFACE AREA OF BETWEEN 0.50 AND 2.0, SAID ELECTRODE HAVING A DEPTH OF BETWEEN 0.001 AND 0.01 INCH AND MESH DIAMETERS OF BETWEEN 0.001 AND 0.05 INCH, SAID MEMBRANE PORE DIAMETERS BEING IN THE RANGE OF ABOUT 5 A. TO ABOUT 50 A.
Claim 2
Dependent Claim
87 words
IN A FUEL CELL COMPRISING AN ANODE AND A CATHODE THE IMPROVEMENT COMPRISING IN COMBINATION A CATALYST COATED WIRE SCREEN NONSACRIFICIAL ELECTRODE AND A POROUS ELECTRONICALLY INSULATIVE MEMBRANE IN CONTACT WITH SAID ELECTRODE, SAID ELECTRODE HAVING A RATIO OF ACTUAL SURFACE AREA TO APPARENT SURFACE AREA OF BETWEEN 0.50 AND 2.0, SAID ELECTRODE HAVING A DEPTH OF BETWEEN 0.001 AND 0.01 INCH AND MESH DIAMETERS OF BETWEEN 0.001 AND 0.05 INCH, SAID MEMBRANE PORE DIAMETERS BEING IN THE RANGE OF ABOUT 5 A. TO ABOUT 50 A.
Claim 3
Dependent Claim
91 words
IN A FUEL CELL COMPRISING AN ANODE AND A CATHODE THE IMPROVEMENT COMPRISING IN COMBINATION A CATALYST COATED, WIRE SCREEN NONSACRIFICIAL ELECTRODE AND A POROUS MEMBRANE, POSITIONED APART FROM SAID ELECTRODE BY ABOUT 0.001 TO ABOUT 1.0 MILLIMETER SAID ELECTRODE HAVING A RATIO OF ACTUAL SURFACE AREA TO APPARENT SURFACE AREA OF BETWEEN 0.50 AND 2.0, SAID ELECTRODE HAVING A DEPTH OF BETWEEN 0.001 AND 0.01 INCH MESH DIAMETERS OF BETWEEN 0.001 AND 0.05 INCH, SAID MEMBRANE PORE DIAMETERS BEING IN THE RANGE OF ABOUT 5 A. TO ABOUT 50 A.
Claim 4
Dependent Claim
91 words
IN A FUEL CELL COMPRISING AN ANODE AND A CATHODE THE IMPROVEMENT COMPRISING IN COMBINATION A CATALYST COATED, WIRE SCREEN NONSACRIFICIAL ELECTRODE AND A POROUS MEMBRANE, POSITIONED APART FROM SAID ELECTRODE BY ABOUT 0.001 TO ABOUT 1.0 MILLIMETER SAID ELECTRODE HAVING A RATIO OF ACTUAL SURFACE AREA TO APPARENT SURFACE AREA OF BETWEEN 0.50 AND 2.0, SAID ELECTRODE HAVING A DEPTH OF BETWEEN 0.001 AND 0.01 INCH MESH DIAMETERS OF BETWEEN 0.001 AND 0.05 INCH, SAID MEMBRANE PORE DIAMETERS BEING IN THE RANGE OF ABOUT 5 A. TO ABOUT 50 A.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |