Robert Wintgen (13 June 1882 – 1966) was a German chemist.
After a post-doc position with Alfred Stock in Berlin between 1917 and 1919 he worked at the University of Göttingen together with Richard Adolf Zsigmondy.
Influenced by this cooperation worked on colloids chemistry from that point on.
Wintgen became professor at the newly founded University of Cologne in 1924 where he stayed until his retirement in 1950.
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