Patents by Inventor Kuniko Hara

Kuniko Hara 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).

  • .alpha.,.beta.-Dihydropolyprenyl derivatives for treating hepatitis
    Patent number: 4571408
    Abstract: An .alpha.,.beta.-dihydropolyprenyl derivative having the formula (I): ##STR1## wherein X represents a group of --COOR.sub.1 or --CH.sub.2 OR.sub.2 in which R.sub.1 is the hydrogen atom or an alkyl group having one to four carbon atoms and R.sub.2 is the hydrogen atom or an aliphatic acyl group having one to four carbon atoms; and n is an integer of one to four. A process for the preparation of the .alpha.,.beta.-dihydropolyprenyl derivative and a therapeutic agent for treatment of liver diseases comprising the same are also disclosed.
    Type: Grant
    Filed: October 20, 1983
    Date of Patent: February 18, 1986
    Assignee: Eisai Co., Ltd.
    Inventors: Isao Yamatsu, Yuichi Inai, Shinya Abe, Hideaki Watanabe, Toshiji Igarashi, Hiroyuki Shiojiri, Yoshio Tanabe, Kuniko Hara
  • .alpha.,.beta.-Dihydropolyprenyl derivatives useful in treating hepatitis
    Patent number: 4481217
    Abstract: An .alpha.,.beta.-dihydropolyprenyl derivative having the formula (I): ##STR1## wherein X represents a group of --COOR.sub.1 or --CH.sub.2 OR.sub.2 in which R.sub.1 is the hydrogen atom or a lower alkyl group and R.sub.2 is the hydrogen atom or an aliphatic acyl group having one to four carbon atoms; and n is an integer of one to four. A process for the preparation of the .alpha.,.beta.-dihydropolyprenyl derivative and a therapeutic agent for treatment of liver diseases comprising the same are also disclosed.
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: November 6, 1984
    Assignee: Eisai Co., Ltd.
    Inventors: Isao Yamatsu, Yuichi Inai, Shinya Abe, Hideaki Watanabe, Toshiji Igarashi, Hiroyuki Shiojiri, Yoshio Tanabe, Kuniko Hara