Patents by Inventor Heinz-Josef Kueppers

Heinz-Josef Kueppers 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).

  • Complexes of thioethers
    Patent number: 5296593
    Abstract: Technetium-99m complexes of crown thioethers having 3 to 6 donor sulphur atoms joined into a macrocyclic ring by C2 or C3 groups, for example 1,4,7-trithiacyclononane (9S3); and of tripodal ligands having more than 3 donor sulphur atoms joined by C2 or C3 groups, for example, 1,1,1-tris(((2-methylthio)ethylthio)-methyl)ethane.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: March 22, 1994
    Assignee: Isis Innovation Limited
    Inventors: Stephen R. Cooper, Heinz-Josef Kueppers, Philip Blower