Patents by Inventor Michael Thomas Przewosny

Michael Thomas Przewosny 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 production of substituted 1,2,3,4-tetrahydroquinoline-2-carboxylic acids
    Patent number: 7145011
    Abstract: The invention relates to a method for the production of substituted 1,2,3,4-tetrahydroquinoline-2-carboxylic acids, i.e. 7,9-dichlor-3a,4,5,9b-tetrahydro-3H-cyclopental[c]quinoline-4-carboxylic acid.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: December 5, 2006
    Assignee: Grunenthal GmbH
    Inventor: Michael Thomas Przewosny
  • Methods for producing substituted acrylic acid esters and use of the latter for producing substituted ?-amino acids
    Patent number: 7141695
    Abstract: The invention relates to methods for producing substituted acrylic acid esters and to the use of the latter for producing substituted ?-amino acids, such as gabapentin and pregabalin. The substituted acrylic acid esters are produced by Wadsworth-Emmons olefination with trialkyl phosphonoacetate in the presence of alkali carbonate as the base, in an aqueous solvent.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: November 28, 2006
    Assignee: Grunenthal GmbH
    Inventors: Michael Thomas Przewosny, Claudia Pütz