Patents by Inventor Shuichiro Kadowaki

Shuichiro Kadowaki 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).

  • .gamma.-butyrolactone derivatives, process for preparing the same and immunomodulating compositions containing the same as active ingredients
    Patent number: 4613613
    Abstract: A .gamma.-butyrolactone derivative represented by the following formula: ##STR1## wherein R.sup.1 represents a hydrogen atom, a straight or branched alkyl group having 1-8 carbon atoms, a phenyl group; R.sup.2 and R.sup.3 may be the same or different and each represents a hydrogen atom, a straight or branched alkyl group having 1-8 carbon atoms, a cycloalkyl group having 3-10 carbon atoms, a benzyl group, a phenyl group, a phenyl group substituted with a substituent selected from the group consisting of a halogen atom, an alkoxy group, a nitro group, an amino group, an alkyl group having 1-4 carbon atoms, a nitrile group and an alkoxycarbonyl group; R.sup.2 and R.sup.3 may be linked to form an alkylene group having 4-6 carbon atoms; X represents a hydrogen atom, a straight or branched alkyl group having 1-8 carbon atoms, a cycloalkyl group having 3-10 carbon atoms, a benzyl group or a substituent represented by the formula ##STR2## (wherein R.sup.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: September 23, 1986
    Assignee: Mitsubishi Yuka Pharmaceutical Co., Ltd.
    Inventors: Tomei Oguri, Yasuhiro Morinaka, Shuichiro Kadowaki