Patents by Inventor Robert D. Hershberg

Robert D. Hershberg 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).

  • Regeneration of chromatography material
    Patent number: 6972327
    Abstract: The invention provides improved methods of regenerating and using affinity chromatography material, in particular Protein A affinity chromatography resins.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: December 6, 2005
    Assignee: Immunex Corporation
    Inventors: Hassan Madani, Robert D. Hershberg
  • Purification process for hepatitis surface antigen and product thereof
    Patent number: 4624918
    Abstract: A method for the purification of hepatitis B surface antigen from recombinant cell culture comprising concentrating the antigen, precipitating the antigen, purifying the antigen by adsorption to an immunoaffinity column, eluting the antigen and fractionating the antigen on an anion exchange bed.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: November 25, 1986
    Assignee: Genentech, Inc.
    Inventor: Robert D. Hershberg