US2690259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation of iron sulfide ore
Assignee: Bethlehem Steel Corp
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Filing: 1951-11-14
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Granted: 1954-09-28
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Expires: 1971-11-14
Abstract
No abstract record available.
Inventors
- 👤 Anderson Arvid Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:14
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/006; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF CONCENTRATING IRON SULFIDE ORE WHICH COMPRISES PULPING THE ORE ADDING TO THE ORE PULP AN EMULSION COMPRISING POLYOXYETHYLENE LAURYL ALCOHOL (SPECIFIC GRAVITY 1.18-1.22), A COLLECTOR OF THE GROUP CONSISTING OF SODIUM ETHYL XANTHATE, SODIUM PROPYL XANTHATE, POTASSIUM ETHYL XANTHATE, POTASSIUM PROPYL XANTHATE AND MIXTURES THEREOF, AND A WOOD CREOSOTE FROTHER, AND SUBJECTING THE PULP TO A FROTH FLOTATION OPERATION.
Claim 2
Independent Claim
62 words
A METHOD OF CONCENTRATING IRON SULFIDE ORE WHICH COMPRISES PULPING THE ORE ADDING TO THE ORE PULP AN EMULSION COMPRISING POLYOXYETHYLENE LAURYL ALCOHOL (SPECIFIC GRAVITY 1.18-1.22), A COLLECTOR OF THE GROUP CONSISTING OF SODIUM ETHYL XANTHATE, SODIUM PROPYL XANTHATE, POTASSIUM ETHYL XANTHATE, POTASSIUM PROPYL XANTHATE AND MIXTURES THEREOF, AND A WOOD CREOSOTE FROTHER, AND SUBJECTING THE PULP TO A FROTH FLOTATION OPERATION.
References Cited (Backward Citations)
US1970578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |