US3607424A
Expired / Lapsed
US
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Solid electrolyte fuel cell
Assignee: Hitachi Ltd
•
Filing: 1969-06-25
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Granted: 1971-09-21
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Expires: 1989-06-25
Abstract
Abstract A solid electrolyte which consists of a mixture of cerium oxide and gadolinium oxide or said mixture with magnesium oxide added thereto, and which has an excellent oxygen-ion-conductive characteristic at a relatively low temperature as compared with conventional solid electrolytes.
Inventors
- 👤 Yoshiyuki Maki
- 👤 Masayuki Matsuda
- 👤 Tetsuichi Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:16
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/185; H01M8/00; H01M8/10; H01M8/12; H01M8/124; H01M8/1246; H01M8/126; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
38 words
A fuel cell of oxygen-hydrogen type as defined in claim 1, in which x and y representing mol numbers of Gd2O3 and MgO respectively are selected within a region surrounded by a curve 3 shown in FIG. 1.
References Cited (Backward Citations)
US3346422A
Cited
US3489610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |