US2503479A
Expired / Lapsed
US
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Removal of impurities from zinc electrolyte solutions
Assignee: Hudbay Minerals Inc
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Filing: 1947-10-06
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Granted: 1950-04-11
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Expires: 1967-10-06
Abstract
No abstract record available.
Inventors
- 👤 Griffith Dinsmore Laurence
- 👤 Rankin Mavis Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:17
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/16; C01; C01G; C01G9/00; C01G9/06; C25D; C25D21/00; C25D21/16; C25D21/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A METHOD OF REMOVING IMPURITIES FROM ZINC ELECTROLYTE SOLUTIONS COMPRISING ADDING TO THE ELECTROLYTE SMALL AMOUNTS OF ZINC DUST, COPPER SULPHATE, A SOLUBLE COMPOUND OF ANTIMONY AND FROM ABOUT 50 TO ABOUT 200 MILLIGRAMS PER LITRE OF LEAD IN THE FORM OF A SOLUBLE COMPOUND.
References Cited (Backward Citations)
US2396569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |