Patents by Inventor Michael Bohusch

Michael Bohusch 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).

  • Preparation of acetoacetarylamides
    Patent number: 5523486
    Abstract: A process for preparing acetoacetarylamides of the formula I ##STR1## where R.sup.1 and R.sup.2 are identical or different alkyl radicals,l and m are each 0, 1 or 2, andis 0 or 1,by addition of diketene to the appropriate arylamine by continuously reacting the arylamine with diketene in the presence of a mixture of water and of a (C.sub.1 -C.sub.4)-alkanol at temperatures from 60.degree. C. to 100.degree. C. in the course of from 0.1 to 10 min.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: June 4, 1996
    Assignee: Hoechst AG
    Inventors: Karl E. Mack, Michael Bohusch
  • Preparation of 5-acetoacetylamino-2-benzimidazolone
    Patent number: 5476948
    Abstract: A process for preparing 5-acetoacetylamino-2-benzimidazolone by continuous reaction of 5-amino-2-benzimidazolone with diketene comprises carrying out the reaction in the presence of a water-soluble (C.sub.1 -C.sub.4)-alcohol or of a mixture of this alcohol with water at the boiling temperature.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: December 19, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karl E. Mack, Michael Bohusch