US2946836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas diffusion electrode
Assignee: Ruhrchemie AG
•
Filing: 1956-01-09
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Granted: 1960-07-26
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Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 Justi Eduard
- 👤 Winsel August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:49
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)
GB189714397A
Cited
US913390A
Cited
GB521773A
Cited
US2620371A
Cited
US2615931A
Cited
GB667298A
Cited
GB723022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |