US2694618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating certain heavy metals from ores
Assignee: EIDP Inc
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Filing: 1950-12-06
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Granted: 1954-11-16
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Gillson
- 👤 William K Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:36
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/16; C22B3/20; C22B3/26; C22B3/34; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE EXTRACTION OF ZINC FROM AN ORE CONTAINING THE SAME AS A COMPOUND OF THE CLASS CONSISTING OF OXIDE AND CARBONATE, SAID ORE ALSO CONTAINING COMPOUNDS OF METALS OTHER THAN THOSE WHICH ARE OF ATOMIC NUMBER ABOVE 26 AND ARE IN GROUPS I-B, II-B, IV-B, AND VIII, WHICH COMPRISES EXTRACTING THE FINELY DIVIDED ORE WITH AN AQUEOUS SOLUTION OF THIOSORBITOL AND SEPARATING THE EXTRACT CONTAINING SAID ZINC FROM THE RESIDUAL ORE CONTAINING COMPOUNDS OF SAID OTHER METALS.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE EXTRACTION OF ZINC FROM AN ORE CONTAINING THE SAME AS A COMPOUND OF THE CLASS CONSISTING OF OXIDE AND CARBONATE, SAID ORE ALSO CONTAINING COMPOUNDS OF METALS OTHER THAN THOSE WHICH ARE OF ATOMIC NUMBER ABOVE 26 AND ARE IN GROUPS I-B, II-B, IV-B, AND VIII, WHICH COMPRISES EXTRACTING THE FINELY DIVIDED ORE WITH AN AQUEOUS SOLUTION OF THIOSORBITOL AND SEPARATING THE EXTRACT CONTAINING SAID ZINC FROM THE RESIDUAL ORE CONTAINING COMPOUNDS OF SAID OTHER METALS.
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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |