Patent US3200055A successfully refreshed from Google Patents.
US3200055A
Expired / Lapsed
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Process for the electrolytic production of hyperpure zinc
Assignee: MONTEVECCHIO ITALIANA DEL PIOMBO E DELLO ZINCO Soc
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Filing: 1961-06-30
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Granted: 1965-08-10
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Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Scacciati Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PREPARING HYPERPURE ZINC CONTAINING LESS THAN 5 P.P.M. OF LEAD, BY ELECTROLYSIS OF A ZINC SULFATE SOLUTION CONTAINING MANGANOUS IONS, WHICH COMPRISES USING AN ANODE CONSISTING OF AN INSOLUBLE LEAD-CONTAINING SHEET, SAID LEAD SHEET BEING SURROUNDED BY A COMPACT DIAPHRAGM COATED WITH MANGANESE DIOXIDE AND HAVING BETWEEN SAID LEAD SHEET AND SAID DIAPHRAGM AN ANOLYTE CONTAINING ABOUT 250-280 G./L. FREE H2SO4, SAID MANGANESE COATING BEING FORMED BY SAID ELECTROLYSIS.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PREPARING HYPERPURE ZINC CONTAINING LESS THAN 5 P.P.M. OF LEAD, BY ELECTROLYSIS OF A ZINC SULFATE SOLUTION CONTAINING MANGANOUS IONS, WHICH COMPRISES USING AN ANODE CONSISTING OF AN INSOLUBLE LEAD-CONTAINING SHEET, SAID LEAD SHEET BEING SURROUNDED BY A COMPACT DIAPHRAGM COATED WITH MANGANESE DIOXIDE AND HAVING BETWEEN SAID LEAD SHEET AND SAID DIAPHRAGM AN ANOLYTE CONTAINING ABOUT 250-280 G./L. FREE H2SO4, SAID MANGANESE COATING BEING FORMED BY SAID ELECTROLYSIS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |