Patents by Inventor Takayoshi Kan

Takayoshi Kan 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).

  • Preparation of live attenuated mumps virus for a vaccine
    Patent number: 4324861
    Abstract: A live attenuated mumps virus vaccine is prepared by cultivating a wild mumps virus strain for 1-18 serial passages in a first living cell to attenuate the virus, and then cultivating the attenuated virus in a second living cell for at least one serial passage to propagate and adapt the virus to the cell. The cell is selected from embryonated hen's egg amnion, embryonated hen's egg chorio-allantoic membrane, chick embryo fibroblast and human diploid cell. Quail embryo fibroblast is also employed. The vaccine prepared has strong immunogenecity and is safe.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: April 13, 1982
    Assignee: Research Foundation for Microbial Diseases of Osaka University
    Inventor: Takayoshi Kan