Patent US3235077A successfully refreshed from Google Patents.
US3235077A
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Flotation of sphalerite
Assignee: New Jersey Zinc Co
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Filing: 1962-05-09
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Granted: 1966-02-15
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Expires: 1982-05-09
Abstract
No abstract record available.
Inventors
- 👤 Mcgarry Phillip Everett
- 👤 Siddle John David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:45
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE METHOD OF RECOVERING SPHALERITE FROM A GROUND ZINC SULFIDE ORE WHICH COMPRISES SUBJECTING THE GROUND ORE TO FROTH FLOTATION IN THE PRESENCE OF A FLOTATION COLLECTOR AND SEPARATING THE THUS-FLOATED SPHALERITE, THE IMPROVEMENT WHICH COMPRISES USING AS THE COLLECTOR 0.001 TO 0.5 POUND PER TONOF ORE OF AN ESTER OF A MERCAPTO CARBOXYLIC ACID WHICH HAS SUFFICIENT WATERSOLUBILITY TO FUNCTION AS THE COLLECTOR WHEN USED IN SAID AMOUNT.
Claim 2
Dependent Claim
70 words
IN THE METHOD OF RECOVERING SPHALERITE FROM A GROUND ZINC SULFIDE ORE WHICH COMPRISES SUBJECTING THE GROUND ORE TO FROTH FLOTATION IN THE PRESENCE OF A FLOTATION COLLECTOR AND SEPARATING THE THUS-FLOATED SPHALERITE, THE IMPROVEMENT WHICH COMPRISES USING AS THE COLLECTOR 0.001 TO 0.5 POUND PER TONOF ORE OF AN ESTER OF A MERCAPTO CARBOXYLIC ACID WHICH HAS SUFFICIENT WATERSOLUBILITY TO FUNCTION AS THE COLLECTOR WHEN USED IN SAID AMOUNT.
References Cited (Backward Citations)
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Cited
GB542641A
Cited
US2251217A
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US2402644A
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US2449984A
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US2467303A
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US2689043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |