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US3809630A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrolysis cell with permeable valve metal anode and diaphragms on both the anode and cathode

Assignee: De Nora SpA
•
Filing: 1972-02-17
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Granted: 1974-05-07
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Expires: 1992-02-17
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Abstract

Abstract DESCRIBES AN ELECTROLYSIS CELL, AND METHOD OF OPERATING THE CELL, HAVING PERMEABLE VALVE METAL ANODES (PREFERABLY TITANIUM OR TATALUM) AND PERMEABLE METAL CATHODES IN WAVE FORM, EACH WITH CLOSED ENDS AND EACH COVERED BY DIAPRAGMS, WITH THE WAVES OF THE CATHODE FINGERS LYING BETWEEN THE WAVES OF THE ANODE FINGERS TO PROVIDE A LARGE ELECTRODE AREA IN A SMALL CELL CONTAINER. THE ANODES AND CATHODES IN WAVE FORM ARE INTERMESHED TOGETHER AND THE CELL MAY BE UNIPOLAR, OR BIPOLAR WITH TERMINAL POSITIVE AND NEGATIVE END CELL UNITS AND A PLURALITY OF INTERMEDIATE CELL UNITS. THE ANOLYTE AND CATHOYLTE DISCHARGE MEANS ARE ADJUSTABLE IN ORDER TO CONTROL THE ANOLYTE AND CATHOLYTE LIQUOR LEVELS BEHIND EACH DIAPHRGM.

Inventors

  • 👤 Nora O De
  • 👤 Nora V De

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 01:34
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/70; C25B9/73; C25B9/77; C25B9/60; C25B9/65

Claims Analysis

Total Claims: 0
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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) 1977-05-06 1977-11-05 1978-05-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-05-06 1981-11-05 1982-05-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-05-06 1985-11-05 1986-05-07 $7700.00 Window Closed / Lapsed

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