US2689044A
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 16:50
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
65 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 GROUP CONSISTING OF DIETHYL PHTHALATE, DIBUTYL PHTHALATE AND DIHEXYL PHTHALATE.
Claim 2
Independent Claim
65 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 GROUP CONSISTING OF DIETHYL PHTHALATE, DIBUTYL PHTHALATE AND DIHEXYL PHTHALATE.
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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 |