US2192154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extracting copper from alkaline solutions
Assignee: AMERICAN BEMBERG Corp
•
Filing: 1938-12-23
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Granted: 1940-02-27
•
Expires: 1958-12-23
Abstract
No abstract record available.
Inventors
- 👤 Schuermann Max Otto
- 👤 Gerstner Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:26
CPC Classifications
C; C01; C01G; C01G3/00; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-02-26 | 1943-08-28 | 1944-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-26 | 1947-08-28 | 1948-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-26 | 1951-08-28 | 1952-02-27 | $7700.00 | Window Closed / Lapsed |