Patent US2509918A successfully refreshed from Google Patents.
US2509918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing nickel and cobalt impurities from zinc electrolyte solutions
Assignee: Hudbay Minerals Inc
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Filing: 1946-03-05
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Granted: 1950-05-30
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Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Griffith Dinsmore Laurence
- 👤 Rankin Mavis Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:10
CPC Classifications
C; C01; C01G; C01G9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A METHOD OF REMOVING IMPURITIES FROM ZINC ELECTROLYTE SOLUTIONS COMPRISING ADDING TO THE ELECTROLYTE SMALL AMOUNTS OF ZINC DUST, COPPER SULPHATE, A SOLUBLE ARSENIC COMPOUND AND FROM ABOUT 100 TO 500 MILIGRAMS PER LITRE OF SILVER IN THE FORM OF A SOLUBLE COMPOUND.
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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |