Patents by Inventor David Torvestad

David Torvestad 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 and apparatus for purifying materials radiolabeled with technetium-99m
    Patent number: 4401646
    Abstract: Compositions labeled with technetium-99m are purified by passage through a filtration column which contains a reducing agent, colloidal stannous phthalate, antioxidant and a particulate solid substrate capable of binding reduced technetium and of retaining insoluble technetium such as reduced hydrolyzed technetium.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: August 30, 1983
    Assignee: University Patents Inc.
    Inventors: Buck A. Rhodes, David Torvestad