Patent US3116170A successfully refreshed from Google Patents.
US3116170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous fuel cells
Assignee: Shell USA Inc
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Filing: 1960-06-06
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Granted: 1963-12-31
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Keith R Williams
- 👤 Derek P Gregery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:09
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A METHOD FOR PRODUCING A FUEL CELL ECTRODE WHICH COMPRISES DEPOSITING BY EVAPORATION A CONDUCTIVE LAYER OF SILVER ON A PLATE OF NON-CONDUCTIVE POLYVINYL CHLORIDE HAVING PORES OF 1/4 TO 25 MICRONS AVERAGE DIAMETER, ELECTRODEPOSITING SILVER ONTO SAID LAYER UNTIL ITS THICKNESS IS
Claim 2
Independent Claim
43 words
A METHOD FOR PRODUCING A FUEL CELL ECTRODE WHICH COMPRISES DEPOSITING BY EVAPORATION A CONDUCTIVE LAYER OF SILVER ON A PLATE OF NON-CONDUCTIVE POLYVINYL CHLORIDE HAVING PORES OF 1/4 TO 25 MICRONS AVERAGE DIAMETER, ELECTRODEPOSITING SILVER ONTO SAID LAYER UNTIL ITS THICKNESS IS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |