Patent US2857155A successfully refreshed from Google Patents.
US2857155A
Expired / Lapsed
US
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Apparatus for reducing ores
Assignee: Electrolyser Corp Ltd
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Filing: 1952-10-04
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Granted: 1958-10-21
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Expires: 1972-10-04
Abstract
No abstract record available.
Inventors
- 👤 David F Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:57
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304755A
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US1213470A
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US1832731A
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US1895284A
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US1989072A
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US1995293A
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FR839891A
Cited
US2236474A
Cited
US2559419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |