US1571054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing silica from ore leaches
Assignee: Siemens and Halske AG
•
Filing: 1925-01-26
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Granted: 1926-01-26
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Expires: 1945-01-26
Abstract
No abstract record available.
Inventors
- 👤 Hosenfeld Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/20; C22B19/26; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C05; C05B; C05B17/00; 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) | 1929-01-25 | 1929-07-27 | 1930-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-25 | 1933-07-27 | 1934-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-25 | 1937-07-27 | 1938-01-26 | $7700.00 | Window Closed / Lapsed |