US3006471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of ores
Assignee: Wyeth Holdings LLC
•
Filing: 1959-11-06
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Granted: 1961-10-31
•
Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 Lionel B Luttinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:40
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF SEPARTING ZINC SULFIDE FROM ORES CONTAINING IT WHICH COMPRISES COMMINUTING SAID ORE TO FREE THE ZINC MINERALS SUBJECTING SAID COMMINUTED ORE TO FROTH FLOTATION IN THE PRESENCE OF AT LEAST 0.001 LB. PER TON OF SAID ORE OF A PROMOTER OF THE FORMULA
Claim 2
Independent Claim
46 words
A METHOD OF SEPARTING ZINC SULFIDE FROM ORES CONTAINING IT WHICH COMPRISES COMMINUTING SAID ORE TO FREE THE ZINC MINERALS SUBJECTING SAID COMMINUTED ORE TO FROTH FLOTATION IN THE PRESENCE OF AT LEAST 0.001 LB. PER TON OF SAID ORE OF A PROMOTER OF THE FORMULA
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |