US2689043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of minerals
Assignee: Minerec Corp
•
Filing: 1950-12-02
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Granted: 1954-09-14
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Expires: 1970-12-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D1/008; B03D1/012; B03D2201/00; B03D2201/007; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF CONCENTRATING A SULPHIDE MINERAL WHICH COMPRISES SUBJECTING SULPHIDE MINERAL-BEARING MATERIAL IN THE FORM OF A PULP TO A FROTH FLOTATION OPERATION IN THE PRESENCE OF AN ANIONIC MINERAL COLLECTING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKYL XANTHOGEN FORMATES, ALKALI METAL ALKYL XANTHATES AND DIALKYL DITHIOPHOSPHATES AND A PLASTICIZER SELECTED FROM THE CLASS CONSISTING OF THE ALKYL AND ARALKYL ESTERS OF PHTHALIC, HYDROXY BENZOIC, SUCCINIC, TARTARIC, ADIPIC, CITRIC, SEBACIC AND PHOSPHORIC ACIDS.
Claim 2
Independent Claim
75 words
THE METHOD OF CONCENTRATING A SULPHIDE MINERAL WHICH COMPRISES SUBJECTING SULPHIDE MINERAL-BEARING MATERIAL IN THE FORM OF A PULP TO A FROTH FLOTATION OPERATION IN THE PRESENCE OF AN ANIONIC MINERAL COLLECTING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKYL XANTHOGEN FORMATES, ALKALI METAL ALKYL XANTHATES AND DIALKYL DITHIOPHOSPHATES AND A PLASTICIZER SELECTED FROM THE CLASS CONSISTING OF THE ALKYL AND ARALKYL ESTERS OF PHTHALIC, HYDROXY BENZOIC, SUCCINIC, TARTARIC, ADIPIC, CITRIC, SEBACIC AND PHOSPHORIC ACIDS.
References Cited (Backward Citations)
GB190902359A
Cited
US962678A
Cited
GB159025A
Cited
US1652099A
Cited
US2065053A
Cited
US2349094A
Cited
US2373688A
Cited
US2393008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |