Patents by Inventor Ivan Pilgrims

Ivan Pilgrims 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 preparation of cyclic 4-oxoamidines
    Patent number: 6037474
    Abstract: The present invention relates to a process for the preparation of cyclic 4-oxoamidines. Such substances are precursors of active substances having biological action. The process according to the invention forms a further method of obtaining this class of compound.By reacting condensation products of aldehydes and aminonitriles or amino acid amides with oxidizing agents, the desired cyclic 4-oxoamidines are obtained according to the invention in good to very good yields.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: March 14, 2000
    Assignee: Degussa-Huuls
    Inventors: Karlheinz Drauz, Rolf Hoffmann, Ivan Pilgrims