US3355017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for effecting ore flotation
Assignee: Wyeth Holdings LLC
•
Filing: 1966-12-02
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Granted: 1967-11-28
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Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Wystrach Vernon Paul
- 👤 Rauhut Michael Mckay
- 👤 Freyberger Wilfred Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS FOR BENEFICIATING BASE METAL ORES CONTAINING A MAJOR AMOUNT OF MIDDLING PARTICLES BY SUBJECTING SAID BASE METAL ORE AS A PULP TO FROTH FLOTATION, SAID PULPED ORE BEING SELECTED FROM TEH GROUP CONSISTING OF COPPER SULFIDES, ZINC SULFIDES, LEAD SULFIDES, IRON SULFIDES AND MIXTURES THEREOF, THE IMPROVEMENT WHICH COMPRISES: INCORPORATING IN SAID PULPED BASE METAL ORE A DITHIOPHOSPHINATE PROMOTER HAVING THE FORMULA:
Claim 2
Dependent Claim
65 words
IN A PROCESS FOR BENEFICIATING BASE METAL ORES CONTAINING A MAJOR AMOUNT OF MIDDLING PARTICLES BY SUBJECTING SAID BASE METAL ORE AS A PULP TO FROTH FLOTATION, SAID PULPED ORE BEING SELECTED FROM TEH GROUP CONSISTING OF COPPER SULFIDES, ZINC SULFIDES, LEAD SULFIDES, IRON SULFIDES AND MIXTURES THEREOF, THE IMPROVEMENT WHICH COMPRISES: INCORPORATING IN SAID PULPED BASE METAL ORE A DITHIOPHOSPHINATE PROMOTER HAVING THE FORMULA:
References Cited (Backward Citations)
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Cited
US2206284A
Cited
US2727067A
Cited
US2797238A
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US2881200A
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US3238248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |