Patents by Inventor Kazuhide Yagami

Kazuhide Yagami 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).

  • Method for purification of HBc antigen and method for measurement of HBc antibody by using said purified HBc antigen
    Patent number: 4839277
    Abstract: A method for the purification of HBc antigen, particularly HBc antigen produced by recombinant organisms by means of DNA recombination technique, which comprises subjecting a solution containing HBc antigen to acid-treatment, wherein the solution containing HBc antigen is acidified to a pH range of not higher than 6 by adding an acid and then resulting precipitates of lipid and contaminant proteins are removed, and then subjecting the acid-treated solution containing HBc antigen to an ion exchange chromatography with an anion exchanger, and a method for measuring HBc antibody by using said purified HBc antigen in a passive hemagglutination method, EIA method or RIA method.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: June 13, 1989
    Assignee: Juridical Foundation The Chemo-Sero-Therapeutic Research Institute
    Inventors: Keishin Sugahara, Takayuki Imamura, Fukusaburo Hamada, Nobuya Ohtomo, Haruo Fujita, Kazuhide Yagami