Patent US3078997A successfully refreshed from Google Patents.
US3078997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation process for concentration of phenacite and bertrandite
Assignee: Individual
•
Filing: 1961-02-24
•
Granted: 1963-02-26
•
Expires: 1981-02-24
Abstract
No abstract record available.
Inventors
- 👤 Havens Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/002; B03D1/006; B03D2201/00; B03D2201/02; B03D2201/06; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A PROCESS FOR THE CONCENTRATION OF A BERYLLIUM MINERAL SELECTED FROM THE CLASS CONSISTING OF PHENACITE, BERTRANDITE, BERYL, AND MIXTURES THEREOF FROM AN ORE CONTAINING THE SAME, TOGETHER WITH GANGUE, WHICH COMPRISES: ADDING TO AN AQUEOUS OF SAID ORE (1) A DEPRESSANT FOR THE GANGUE COMPRISING AN ALKALI METAL FLUORIDE AND AN ALKALI METAL POLYPHOSPHATE; (2) A FATTY ACID TYPE COLLECTOR FOR THE BERYLLIUM MINERAL COMPRISING A MEMBER OF THE CLASS CONTAINING OF HIGHER FATTY ACID, AND A LIGHT NEUTRAL HYDROCARBON OIL TOGETHER WITH A HIGHER FATTY ACID; MAINTAINING THE PH OF THE RESULTING PULP AT A RANGE OF FROM ABOUT 7.5 TO ABOUT 9.4; AND THEN FROTH FLOATING THE BERYLLIUM MINERALS FROM THE GANGUE.
References Cited (Backward Citations)
US2040187A
Cited
US2373305A
Cited
US2385819A
Cited
US2424552A
Cited
US2666587A
Cited
US2797808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |