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Bertold Stegemann
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Frankfurt am Main, DE
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last 30 patents
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Patent Grant
Process of continuously controlling the pH of an acid liquid includ...
Patent number
5,643,797
Issue date
Jul 1, 1997
Hans J. Schmidt
G05 - CONTROLLING REGULATING
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Patent Grant
Process for controlling the pH value of an acid scrubbing liquid
Patent number
5,246,594
Issue date
Sep 21, 1993
Metallgesellschaft Aktiengesellschaft
Bertold Stegemann
G05 - CONTROLLING REGULATING