US3438878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous refining of zinc and manganese dioxide
Assignee: Union Carbide Canada Ltd
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Filing: 1966-10-27
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Granted: 1969-04-15
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Donald K Bell
- 👤 Graham Edward Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:05
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/16; C01; C01G; C01G9/00; C01G9/02; C25B; C25B1/00; C25B1/01; C25B1/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE SIMULTANEOUS ELECTROLYTIC PRODUCTION OF MANGANESE DIOXIDE AND ZINIC COMPRISING: CHARGING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF MANGANESE SULPHATE AND ZINCO SULPHATE IN CONCENTRATIONS SUFFICIENT TO LIMIT CONCENTRATION POLARIZATION INTO AN ELECTROLYTIC CELL HAVING A CATHODE UPON WHICH ZINC CAN BE PLATED AND AN ANODE UPON WHICH MANGANESE DIOXIDE CAN BE PLATED. HEATING THE CELL AND ITS CONTENTS TO A TEMPERATURE WITHIN A RANGE OF WHICH THE UPPER LIMIT IS ABOUT 100*C. AND OF WHICH THE LOWER LIMIT IS ABOUT 75*C. AND CAUSING A CURRENT TO FLOW BETWEEN THE ANODE AND THE CATHODE.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE SIMULTANEOUS ELECTROLYTIC PRODUCTION OF MANGANESE DIOXIDE AND ZINIC COMPRISING: CHARGING AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF MANGANESE SULPHATE AND ZINCO SULPHATE IN CONCENTRATIONS SUFFICIENT TO LIMIT CONCENTRATION POLARIZATION INTO AN ELECTROLYTIC CELL HAVING A CATHODE UPON WHICH ZINC CAN BE PLATED AND AN ANODE UPON WHICH MANGANESE DIOXIDE CAN BE PLATED. HEATING THE CELL AND ITS CONTENTS TO A TEMPERATURE WITHIN A RANGE OF WHICH THE UPPER LIMIT IS ABOUT 100*C. AND OF WHICH THE LOWER LIMIT IS ABOUT 75*C. AND CAUSING A CURRENT TO FLOW BETWEEN THE ANODE AND THE CATHODE.
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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |