US325835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for concentrating ores
Assignee: —
•
Filing: —
•
Granted: 1885-09-08
•
Expires: 1902-09-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/03
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) | 1888-09-07 | 1889-03-09 | 1889-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1892-09-07 | 1893-03-09 | 1893-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1896-09-07 | 1897-03-09 | 1897-09-08 | $7700.00 | Window Closed / Lapsed |