Patents by Inventor Tsunehiko Kataoka

Tsunehiko Kataoka 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 purifying elastase
    Patent number: 4458018
    Abstract: A process is disclosed for purifying elastase by precipitating elastase from an aqueous, elastase-containing solution, in which the electroconductivity of said aqueous solution is adjusted to 3 millimhos per centimeter or less and the pH of the solution is adjusted to a value of from 2 to 5. The electroconductivity of said aqueous solution is preferably adjusted to 3 millimhos per centimeter or less by means of ultrafiltration.
    Type: Grant
    Filed: December 1, 1982
    Date of Patent: July 3, 1984
    Assignee: Eisai Co., Ltd.
    Inventors: Tsunehiko Kataoka, Yoshiaki Nagara, Akira Hashimoto, Masayuki Konishi, Koichi Ogawa
  • Process for the preparation of gastrointestinal hormone
    Patent number: 4150117
    Abstract: Gastrointestinal hormone is prepared by heating the small intestine of mammal in an aqueous solution of a salt and extracting the gastrointestinal hormone and purifying it.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: April 17, 1979
    Assignee: Eisai Co., Ltd.
    Inventors: Tsunehiko Kataoka, Sinzou Watanabe, Syouji Kitakaji, Koichi Ogawa, Seiji Yoshida