Patent US5324559A successfully refreshed from Google Patents.
US3467553A
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Fuel cell construction with involute reactant flow directing means
Assignee: Leesona Corp
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Filing: 1966-06-29
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Granted: 1969-09-16
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Expires: 1986-06-29
Abstract
No abstract record available.
Inventors
- 👤 Loren H White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:48
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; H01M4/8626; H01M8/00; H01M8/02; H01M8/0202; H01M8/0258; H01M8/0263; H01M8/24; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1036609A
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US2281168A
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US2230064A
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US3101285A
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US3259524A
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US3146131A
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US3298867A
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US3354000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |