US2535344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of minerals with hydroperoxide frothers
Assignee: Hercules Powder Co
•
Filing: 1949-11-26
•
Granted: 1950-12-26
•
Expires: 1969-11-26
Abstract
No abstract record available.
Inventors
- 👤 William T Bishop
- 👤 Eugene J Lorand
- 👤 John E Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:53
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D2201/00; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN THE METHOD OF BENEFICATING ORES BY FROTH FLOTATION, A STEP WHICH COMPRISES AERATING A PULP OF THE ORE CONTAINING A COLLECTOR AND SECONDARY CYCLIC HYDROPEROXIDE HAVING THE STRUCTURAL FORMULA.
Claim 2
Dependent Claim
30 words
IN THE METHOD OF BENEFICATING ORES BY FROTH FLOTATION, A STEP WHICH COMPRISES AERATING A PULP OF THE ORE CONTAINING A COLLECTOR AND SECONDARY CYCLIC HYDROPEROXIDE HAVING THE STRUCTURAL FORMULA.
References Cited (Backward Citations)
US2415800A
Cited
US2467369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |