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US2692048A
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Method for sink and float mineral separation
Assignee: Individual
•
Filing: 1950-09-25
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Granted: 1954-10-19
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Expires: 1970-09-25
Abstract
No abstract record available.
Inventors
- 👤 Nelson L Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:04
CPC Classifications
B; B03; B03B; B03B13/00; B03B13/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2135957A
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US2151175A
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US2206980A
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US2325149A
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US2387866A
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US2496590A
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US2490365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |