Patent US3451807A successfully refreshed from Google Patents.
US3451807A
Expired / Lapsed
US
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Solvent extraction process for the recovery of metal values
Assignee: Monsanto Research Corp
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Filing: 1966-11-29
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Granted: 1969-06-24
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 William G Scribner
- 👤 George K Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/306; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF EXTRACTING OF METAL VALUES SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS II-A, II-B, AND III-B OF THE PERIODIC ARRANGEMENT OF ELEMENTS, COPPER (II), LEAD (II), CHROMIUM (III), IRON (III), COBALT (II), NICKEL (II) AND MANGANESE (II) FROM AQUEOUS SOLUTIONS CONTAINING SAID VALUES, WHICH COMPRISES CONTACTING THE AQUEOUS SOLUTION WITH A SOLUTION OF TRIFLUOROACETYLACE-
Claim 2
Independent Claim
59 words
THE METHOD OF EXTRACTING OF METAL VALUES SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS II-A, II-B, AND III-B OF THE PERIODIC ARRANGEMENT OF ELEMENTS, COPPER (II), LEAD (II), CHROMIUM (III), IRON (III), COBALT (II), NICKEL (II) AND MANGANESE (II) FROM AQUEOUS SOLUTIONS CONTAINING SAID VALUES, WHICH COMPRISES CONTACTING THE AQUEOUS SOLUTION WITH A SOLUTION OF TRIFLUOROACETYLACE-
References Cited (Backward Citations)
US3201334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |