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US3801480A
Expired / Lapsed
US
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Process for reducing losses of mercury in the alkali metal chloride electrolysis according to the amalgamation process
Assignee: Hoechst AG
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Filing: 1971-09-20
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Granted: 1974-04-02
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Expires: 1991-09-20
Abstract
Abstract LOSSES OF MERCURY ARISING DURING FILTRATION IN THE ELECTROLYTIC PRODUCTION OF CHLORINE ACCORDING TO THE AMALGAMATION PROCESS WITH ELECTROLYTE CYCLE AND ALKALINE FILTRATION OF THE ELECTROLYTE ARE REDUCED BY ADDING HYPOCHLORITE TO THE ELECTROLYTE BEFORE THE FILTRATION.
Inventors
- 👤 M Krieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:07
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/36; C25B15/00; C25B15/08; C25B15/085; C25B15/087
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |