Patents by Inventor Uwe Bäumler

Uwe Bäumler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparing amido phenyl esters
    Patent number: 6307076
    Abstract: Process for the preparation of amido phenyl esters by reacting an amido acid with an inorganic acid chloride in the melt and reacting the resulting amidocarboxylic acid halide with a phenol derivative in an organic solvent.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: October 23, 2001
    Assignee: Clariant GmbH
    Inventors: Michael Seebach, Peter Naumann, Uwe Bäumler
  • Process for the preparation of 4,4'-dimethyl-6,6'-dichlorothioindigo
    Patent number: 5981766
    Abstract: 4,4'-Dimethyl-6,6'-dichlorothioindigo is obtained in the stable crystal modification I, distinguished by the fraction angles (2 theta):lines of high intensity: 25.99; 27.26lines of moderate intensity: 10.27; 12.48; 22.39; 23.91; 24.82; 28.87,by oxidizing 3-hydroxy-4-methyl-6-chlorothionaphthene having a mean particle size of at most 20 .mu.m.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: November 9, 1999
    Assignee: Clariant GmbH
    Inventors: Wolfgang Bauer, Uwe Baeumler, Hans Kurz, Hans-Peter Kreutzer