Patents by Inventor Ernst Burgi

Ernst Burgi 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 the diazotisation of primary aromatic amines which are sparingly soluble in water
    Patent number: 4874847
    Abstract: Amines which are sparingly soluble in water are diazotised by first preparing a melt or solution of said amines and then precipitating them from the melt or a solution in an organic solvent by adding water, and then diazotising the resultant suspension. In this procedure, the reaction times are appreciably shorter than those of conventional processes.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: October 17, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Rudiger Oxenius, Ernst Burgi, Vladimir Arnold, Ferenc Rakoczi