Patents by Inventor Terufumi Fujiwara

Terufumi Fujiwara 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).

  • Process for producing a hepatitis B infection preventing vaccine
    Patent number: 4565697
    Abstract: A process for producing a hepatitis B infection preventing vaccine containing hepatitis B surface antigen as a main component thereof which comprises removing human plasma components possibly causing adverse effects and components capable of causing hepatitis B infection by incorporating steps of fractionation using ammonium sulfate, adsorption on a colloidal silicate and fractionation using polyethylene glycol into the purification stage after heat treatment and further carrying out a treatment for infectivity inactivation without causing any antigenicity impairment.
    Type: Grant
    Filed: November 15, 1983
    Date of Patent: January 21, 1986
    Assignee: Green Cross Corporation
    Inventors: Takao Ohmura, Terufumi Fujiwara, Akimasa Ohmizu, Satoshi Funakoshi