US2644580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral flotation
Assignee: Beazer East Inc
•
Filing: 1949-07-06
•
Granted: 1953-07-07
•
Expires: 1969-07-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas E Robbins
- 👤 William H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:50
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
IN A PROCESS FOR THE FROTH FLOTATION OF A SULFIDIC ORE THE STEP OF EFFECTING THE FLOTATION IN THE PRESENCE OF 2-MERCAPTOBENZIMIDAZOLE.
Claim 2
Dependent Claim
22 words
IN A PROCESS FOR THE FROTH FLOTATION OF A SULFIDIC ORE THE STEP OF EFFECTING THE FLOTATION IN THE PRESENCE OF 2-MERCAPTOBENZIMIDAZOLE.
References Cited (Backward Citations)
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US1801318A
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US1801319A
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US1806362A
Cited
US1852107A
Cited
US2364272A
Cited
US2297664A
Cited
US2380698A
Cited
GB617944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |