Patent US2444157A successfully refreshed from Google Patents.
Patent US3224874A successfully refreshed from Google Patents.
US3224874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering metals
Assignee: MARY H DAUGHERTY
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Filing: 1962-08-15
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Granted: 1965-12-21
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Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 Charles C Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:27
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B7/00; C22B7/006; C22B7/007; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF RECOVERING COBALT AND NICKEL FROM A NORMALLY CORROSION RESISTANT SOLID ALLOY CONTAINING COBALT, NICKEL, AND OTHER METAL VALUES WHICH COMPRISES THE STEPS OF PLACING SAID ALLOY IN A SUITABLE REACTION VESSEL, ADDING A DILUTE ACIDIC SOLUTION OF CHLORIDE IONS TO SAID REACTION VESSEL, ADDING SOLUBLE INORGANIC NITRATE TO FORM A REACTION MIXTURE AND CONDUCTING A REACTION THEREWITH, SEPARATING THE RESULTANT SOLUTION CONTAINING CHLORIDE IONS FROM REMAINING ALLOY, DILUTING AND COOLING SAID RESULTANT SOLUTION, AERATING AND ADJUSTING THE PH OF SAID RESULTANT SOLUTION TO JPRECIPITATE OTHER METAL VALUES AS OXIDES AND SEPARATING SAID OXIDES FROM THE DILUTED SOLULTION, INTRODUCING MORE CHLORIDE IONS IN THE FORM OF A CHLORINE GAS INTO SAID RESULTANT SOLUTION AND TREATING SAID RESULTANT SOLUTION TO PRECIPITATE OUT COBALT AND NICKEL AND CONTINUING THE INTRODUCTION OF CHLORIDE IONS TO REDISSOLVE CO-PRECIPITATED NICKEL AND FURTHER TREATING SAID RESULTANT SOLUTION TO PRECIPITATE NICKEL.
Claim 2
Independent Claim
146 words
THE METHOD OF RECOVERING COBALT AND NICKEL FROM A NORMALLY CORROSION RESISTANT SOLID ALLOY CONTAINING COBALT, NICKEL, AND OTHER METAL VALUES WHICH COMPRISES THE STEPS OF PLACING SAID ALLOY IN A SUITABLE REACTION VESSEL, ADDING A DILUTE ACIDIC SOLUTION OF CHLORIDE IONS TO SAID REACTION VESSEL, ADDING SOLUBLE INORGANIC NITRATE TO FORM A REACTION MIXTURE AND CONDUCTING A REACTION THEREWITH, SEPARATING THE RESULTANT SOLUTION CONTAINING CHLORIDE IONS FROM REMAINING ALLOY, DILUTING AND COOLING SAID RESULTANT SOLUTION, AERATING AND ADJUSTING THE PH OF SAID RESULTANT SOLUTION TO JPRECIPITATE OTHER METAL VALUES AS OXIDES AND SEPARATING SAID OXIDES FROM THE DILUTED SOLULTION, INTRODUCING MORE CHLORIDE IONS IN THE FORM OF A CHLORINE GAS INTO SAID RESULTANT SOLUTION AND TREATING SAID RESULTANT SOLUTION TO PRECIPITATE OUT COBALT AND NICKEL AND CONTINUING THE INTRODUCTION OF CHLORIDE IONS TO REDISSOLVE CO-PRECIPITATED NICKEL AND FURTHER TREATING SAID RESULTANT SOLUTION TO PRECIPITATE NICKEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |