Patents by Inventor Hans Bonnier

Hans Bonnier 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).

  • Method for the preparation of dicarboxylic lmides
    Publication number: 20070197791
    Abstract: The present invention relates to a method for the preparation of a carboxylic imide having the general formula R1—(CO)—(NR3)—(CO)—R2??(I), wherein a carboxylic anhydride having the general formula R1—(CO)—O—(CO)—R2??(II) is reacted with urea or a urea derivative of the form (R3HN)—(CO)—(NR3H) in a solvent. In particular, the method can be used for the preparation of thalidomide.
    Type: Application
    Filed: January 22, 2007
    Publication date: August 23, 2007
    Applicant: SIEGFRIED Ltd.
    Inventors: Thomas Landmesser, Hans Bonnier
  • Method for the preparation of dicarboxylic imides
    Publication number: 20070173647
    Abstract: The present invention relates to a method for the preparation of a carboxylic imide having the general formula R1—(CO)—(NR3)—(CO)—R2 , ??(I) wherein a carboxylic anhydride having the general formula R1—(CO)—O—(CO)—R2 ??(II) is reacted with urea or a urea derivative of the form (R3HN)—(CO)—(NR3H) in a solvent. In particular, the method can be used for the preparation of thalidomide.
    Type: Application
    Filed: November 29, 2006
    Publication date: July 26, 2007
    Applicant: SIEGFRIED Ltd.
    Inventors: Thomas Landmesser, Hans Bonnier