US2666587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of beryllium ores by froth flotation
Assignee: Individual
•
Filing: 1952-06-23
•
Granted: 1954-01-19
•
Expires: 1972-06-23
Abstract
No abstract record available.
Inventors
- 👤 Sidney M Runke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:56
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE FLOTATION OF BERYL FROM BERYLLIFEROUS MATERIAL COMPRISING TREATING A PULP OF THE BERYLLIFEROUS MATERIAL WITH A HYPOCHLORITE SOLUTION TO ACTIVATE THE BERYL PARTICLES FOR FLOTATION, AND THEN FROTH FLOATING THE BERYL PARTICLE FORM THE RESIDUAL GANGUE IN THE PRESENCE OF A WATER-SOLUBLE SULFONATE.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE FLOTATION OF BERYL FROM BERYLLIFEROUS MATERIAL COMPRISING TREATING A PULP OF THE BERYLLIFEROUS MATERIAL WITH A HYPOCHLORITE SOLUTION TO ACTIVATE THE BERYL PARTICLES FOR FLOTATION, AND THEN FROTH FLOATING THE BERYL PARTICLE FORM THE RESIDUAL GANGUE IN THE PRESENCE OF A WATER-SOLUBLE SULFONATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |