US2424402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation of sulfide ores with phosphorous-sulfide-olefin reaction product
Assignee: Standard Oil Co
•
Filing: 1944-09-14
•
Granted: 1947-07-22
•
Expires: 1964-09-14
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Loane
- 👤 James W Gaynor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:31
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/014; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904460A
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US1772386A
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US1839155A
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US2125337A
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US1949956A
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US2316086A
Cited
US2351763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |