Patents by Inventor Tsuyoshi Mokudai

Tsuyoshi Mokudai 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 of purifying cytidine diphosphate choline
    Patent number: 8303820
    Abstract: A method of purifying cytidine diphosphate choline, which comprises contacting a cytidine diphosphate choline solution containing a nucleic acid analogue and having a pH of not less than 0.5 and not more than 5.0 with an H-type strongly acidic cation exchange resin, and eluting cytidine diphosphate choline adsorbed onto the resin with water or an aqueous solution having an ion concentration of not more than 0.1 mol/L to separate and purify the cytidine diphosphate choline.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: November 6, 2012
    Assignee: Kyowa Hakko Bio Co., Ltd.
    Inventors: Hideki Murata, Tsuyoshi Mokudai, Michio Shiomi
  • METHOD OF PURIFYING CYTIDINE DIPHOSPHATE CHOLINE
    Publication number: 20090286284
    Abstract: A method of purifying cytidine diphosphate choline, which comprises contacting a cytidine diphosphate choline solution containing a nucleic acid analogue and having a pH of not less than 0.5 and not more than 5.0 with an H-type strongly acidic cation exchange resin, and eluting cytidine diphosphate choline adsorbed onto the resin with water or an aqueous solution having an ion concentration of not more than 0.1 mol/L to separate and purify the cytidine diphosphate choline.
    Type: Application
    Filed: August 10, 2006
    Publication date: November 19, 2009
    Applicant: KYOWA HAKKO KOGYO CO., LTD.
    Inventors: Hideki Murata, Tsuyoshi Mokudai, Michio Shiomi
  • DC115A compounds produced by streptomyces sp.
    Patent number: 5066817
    Abstract: Disclosed are DC115A compounds represented by the following general formula: ##STR1## wherein R represents ethyl, propyl or 1-propenyl, and which have antibacterial and anti-tumor activity. DC115A compounds are produced by culturing a microorganism belonging to the genus Streptomyces.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: November 19, 1991
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Hirofumi Nakano, Mitsunobu Hara, Tsuyoshi Mokudai, Isao Kawamoto, Mayumi Yoshida, Eiji Kobayashi