US2423456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-stage froth flotation
Assignee: Mining Process and Patent Co
•
Filing: 1943-04-16
•
Granted: 1947-07-08
•
Expires: 1963-04-16
Abstract
No abstract record available.
Inventors
- 👤 Leland H Logue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:30
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/02; B03D1/028; B03D1/1406; B03D1/1412; B03D1/1443; B03D1/1475
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2047643A
Cited
US2316770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |