Patents by Inventor James M. Graaskamp

James M. Graaskamp 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).

  • Pyrogens separations by ceramic ultrafiltration
    Patent number: 5104546
    Abstract: The method of the present invention for separating pyrogens includes passing a pyrogen-containing liquid through a zirconium oxide membrane on a ceramic support. The membrane on ceramic support preferably includes a porous sintered zircondium oxide membrane on alpha-alumina support.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: April 14, 1992
    Assignee: Aluminum Company of America
    Inventors: James L. Filson, Ramesh R. Bhave, James R. Morgart, James M. Graaskamp