US1783591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for leaching and washing ores by the use of gas
Assignee: Individual
•
Filing: 1929-01-26
•
Granted: 1930-12-02
•
Expires: 1949-01-26
Abstract
No abstract record available.
Inventors
- 👤 Albert B Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:18
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/02; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0219; 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) | 1933-12-01 | 1934-06-02 | 1934-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-12-01 | 1938-06-02 | 1938-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-12-01 | 1942-06-02 | 1942-12-02 | $7700.00 | Window Closed / Lapsed |