Patents by Inventor Heidi Smith-Johannsen

Heidi Smith-Johannsen 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).

  • Isolation of human interferon by immunosorbent and high performance liquid chromatography
    Patent number: 4485017
    Abstract: An improved process for the isolation and purification of HIFNs is disclosed wherein a partially purified preparation of the HIFN is sequentially passed through an antibody affinity column and a reversed-phase high performance liquid chromatographic column. Organic solvents used during the elution are extracted and the protein concentrated for subsequent use.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: November 27, 1984
    Assignee: Cetus Corporation
    Inventors: Yin H. Tan, Heidi Smith-Johannsen