Patents by Inventor Wilhelm Quittman

Wilhelm Quittman 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 and catalyst
    Patent number: 8242044
    Abstract: Aromatic or heteroaromatic nitro compounds are catalytically hydrogenated to the corresponding amines in the presence of a platinum catalyst comprising elemental platinum on a support; the platinum catalyst is modified with a molybdenum compound and a phosphorus compound wherein the phosphorus has an oxidation state of less than +5, e.g. hypophosphorous acid; the catalyst is particularly useful in the hydrogenation of nitro compounds with halogen and/or sulfur-containing substituents.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: August 14, 2012
    Assignee: AstraZeneca AB
    Inventors: Wilhelm Quittman, Thomas Peter Belser, Rhony Niklaus Aufdenblatten
  • Process And Catalyst
    Publication number: 20110071290
    Abstract: Aromatic or heteroaromatic nitro compounds are catalytically hydrogenated to the corresponding amines in the presence of a platinum catalyst comprising elemental platinum on a support; the platinum catalyst is modified with a molybdenum compound and a phosphorus compound wherein the phosphorus has an oxidation state of less than +5, e.g. hypophosphorous acid; the catalyst is particularly useful in the hydrogenation of nitro compounds with halogen and/or sulfur-containing substituents.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 24, 2011
    Applicant: AstraZeneca AB
    Inventors: Wilhelm Quittman, Thomas Peter Belser, Rhony Niklaus Aufdenblatten