US3671323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophobic layers for gas diffusion electrodes
Assignee: Westinghouse Electric Corp
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Filing: 1970-01-12
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Granted: 1972-06-20
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Expires: 1990-01-12
Abstract
Abstract A GAS DIFFUSION ELECTRODE HAVING A GAS ENTRANCE SIDE AND AN ELECTROLYTE CONTACTING SIDE FOR SUE WITH A LIQUID ELECTROLYTE AND A GAS IN AN ELECTROCHEMICAL CELL, COMPRISES A COHERENT POROUS BODY, CONTAINING AN ELECTRICAL CONDUCTOR AND A HYDROPHOBIC OUTER LAYER ON THE GAS ENTRANCE SIDE, THE HYDROPHOBIC OUTER LAYER COMPRISING CLOTH MATERIAL IMPREGNATED WITH WET PROOFING POLYMER.
Inventors
- 👤 Yehuda L Sandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:52
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) | 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 |