Patent US3273997A successfully refreshed from Google Patents.
US3273997A
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US
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Wet process for the separation, isolation, and recovery of certain metallic and non-metallic constituents of waste slag from reverberatory refining of copper pyritic type ores
Assignee: Wilson Laboratories Inc
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Filing: 1964-02-28
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Granted: 1966-09-20
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Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Harold W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:05
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A WET PROCESS FOR THE SEPARATION, ISOLATION AND RECOVERY OF THE ACID SOLUBLE METALLIC AND NON-METALLIC VALUES IN WASTE SLAG RESULTING FROM THE REVERBRATORY REFINING OF COPPER PYRITIC TYPE ORES WHICH COMPRISES: CRUSHING THE SLAG; ADDING A WARM SOLUTION OF AT LEAST ONE MINERAL ACID TO SAID CRUSHED SLAG, SAID SOLUTION HAVING A NORMALITY OF 4 AT THE TIME IT IS ADDED TO THE SLAG; MIXING THE SLAG AND ACID FOR NOT LESS THAN 8 MINUTES UNDER CONDITIONS SUCH THAT THE TWO ARE NOT PERMITTED TO REACH A TEMPERATURE OF 175*F., WHEREBY THE FORMATION OF SILICA GEL IS AVOIDED; SEPARATING THE RESULTING SOLUTION FROM THE SOLID INSOLUBLE RESIDUE; AND RECOVERING THE SOLUBLE IRON, LEAD, COPPER, CALCIUM SILICON, ZINC AND ALUMINUM VALUES ORIGINALLY PRESENT IN SAID SLAG FROM SAID SOLUTION.
Claim 2
Dependent Claim
129 words
A WET PROCESS FOR THE SEPARATION, ISOLATION AND RECOVERY OF THE ACID SOLUBLE METALLIC AND NON-METALLIC VALUES IN WASTE SLAG RESULTING FROM THE REVERBRATORY REFINING OF COPPER PYRITIC TYPE ORES WHICH COMPRISES: CRUSHING THE SLAG; ADDING A WARM SOLUTION OF AT LEAST ONE MINERAL ACID TO SAID CRUSHED SLAG, SAID SOLUTION HAVING A NORMALITY OF 4 AT THE TIME IT IS ADDED TO THE SLAG; MIXING THE SLAG AND ACID FOR NOT LESS THAN 8 MINUTES UNDER CONDITIONS SUCH THAT THE TWO ARE NOT PERMITTED TO REACH A TEMPERATURE OF 175*F., WHEREBY THE FORMATION OF SILICA GEL IS AVOIDED; SEPARATING THE RESULTING SOLUTION FROM THE SOLID INSOLUBLE RESIDUE; AND RECOVERING THE SOLUBLE IRON, LEAD, COPPER, CALCIUM SILICON, ZINC AND ALUMINUM VALUES ORIGINALLY PRESENT IN SAID SLAG FROM SAID SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |