US3590997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of sulfide ores
Assignee: Dow Chemical Co
•
Filing: 1969-02-13
•
Granted: 1971-07-06
•
Expires: 1989-02-13
Abstract
Abstract An improvement in the concentration of ores by flotation which comprises subjecting a sulfide ore in the form of a pulp to a flotation process in the presence of an effective quantity of a flotation collector corresponding to the formula WHEREIN A is a radical corresponding to the formula D R A W I N G
Inventors
- 👤 Guy H Harris
- 👤 Terry D Filer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
8 words
A is a radical corresponding to the formula
Claim 2
Dependent Claim
26 words
The process as defined in claim 1 wherein from about 0.01 to about 0.25 pound of said compound per ton of sulfide ore pulp is employed.
Claim 3
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
Claim 4
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
Claim 5
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
Claim 6
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
Claim 7
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
Claim 8
Dependent Claim
15 words
The process as defined in claim 1 wherein said flotation collector corresponds to the formula
References Cited (Backward Citations)
US2701253A
Cited
US2342332A
Cited
US2691635A
Cited
US2895980A
Cited
DE1032733B
Cited
US3025214A
Cited
US3290351A
Cited
US3082237A
Cited
US3464551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |