US3497390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cells:palladium hydrogen diffusion electrode
Assignee: United States Department of the Air Force
•
Filing: 1966-11-29
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Granted: 1970-02-24
•
Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Norbert D Greene
- 👤 Harold J Cleary
- 👤 Livio Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/94; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3207682A
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US3337368A
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US3337369A
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US3318730A
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US3393098A
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US3310434A
Cited
US3271327A
Cited
US3346421A
Cited
US3375140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |