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Rolf Wittmann
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Muhltal, DE
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last 30 patents
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Patent Grant
Process for separating and recovering metal catalysts
Patent number
4,414,401
Issue date
Nov 8, 1983
Merck Patent Gesellschaft mit beschrankter Haftung
Willi Wintermeyer
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Preparation of diacetoneketogulonic acid by oxidation of diacetones...
Patent number
4,387,245
Issue date
Jun 7, 1983
Merck Patent Gesellschaft mit beschrankter Haftung
Rolf Wittmann
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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Patent Grant
Preparation of diacetone-ketogulonic acid
Patent number
4,375,393
Issue date
Mar 1, 1983
Merck Patent Gesellschaft mit beschrankter Haftung
Fritz Reiff
C07 - ORGANIC CHEMISTRY
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Patent Grant
Process for the preparation of riboflavin
Patent number
4,355,158
Issue date
Oct 19, 1982
Merck Patent Gesellschaft mit beschrankter Haftung
Rudolf Wolf
C07 - ORGANIC CHEMISTRY