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Patent US3671317A successfully refreshed from Google Patents.
US3671317A
Expired / Lapsed
US
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Method of making fuel cell electrodes
Assignee: RTX Corp
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Filing: 1970-02-10
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Granted: 1972-06-20
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Expires: 1990-02-10
Abstract
Abstract IN EXPENSIVE SCREEN SUBSTRATES FOR FUEL CELL ELECTRODES ARE PROVIDED WITH A NONPOROUS VINYLIDENE FLUORIDE CORROSION RESISTANT COATING. THEREAFTER, A SECOND, METAL PARTICLE AND POROUS POLYMER, COATING IS PROVIDED. CURE OF THE SECOND COATING MUST BE COMPATIBLE WITH THE FIRST COATING AND MONITORED TO PREVENT THE FLOW OF THE POLYMER IN THE SECOND COATING SO THAT A POROUS STRUCTURE WITH THE DESIRED HYDROPHILC PROPERTIES AND CONDUCTIVE PROPERTIES PREFERRED IN ELECTRODE STRUCTURE CAN BE OBTAINED.
Inventors
- 👤 Ernest Rifkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8803; H01M4/8807; H01M4/8817; H01M4/8825; H01M4/886; H01M4/8878; H01M4/8882; H01M8/00; H01M8/02; H01M8/0202; H01M8/023; H01M8/0232; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |