Patent US3556856A successfully refreshed from Google Patents.
US3556856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-layer fuel cell electrode
Assignee: Union Carbide Corp
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Filing: 1968-08-22
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Granted: 1971-01-19
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Expires: 1988-08-22
Abstract
Abstract ELECTRODES WHICH COMPRISE(A) A POROUS METAL LAYER HAVING RELATIVELY FINE PORES FORMING THE ELECTROLYTE SIDE OF THE ELECTRODE, (B) A CENTER LAYER OF POROUS METAL HAVING RELATIVELY COARSE PORES, ONE SIDE OF WHICH IS BONDED TO THE FINE PORED MEATL LAYER, AND (C) A GAS PERMEABLE LAYER OF PLASTIC BONDED ACTIVE MATERIAL WHICH FORMS THE GAS SIDE OF THE ELECTRODE AND WHICH IS BONDED TO THE OTHER SIDE OF THE COARSE PORED METAL LAYER, AT LEAST A PORTION OF SUCH BONDING TAKING PLACE THROUGH PENETRATION OF THE PLASTIC BONDED MATERIAL INTO THE COARSE PORES.
Inventors
- 👤 Raymond J Elbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |