Patents by Inventor Keizo Kinashi

Keizo Kinashi 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).

  • Antihypertensive 2-oxo-imidazolidine derivatives
    Patent number: 4508727
    Abstract: Novel 2-oxo-imidazolidine derivative of the formula: ##STR1## wherein R.sup.1 is lower alkyl or phenyl-lower alkyl, R.sup.2 is lower alkyl, R.sup.3 is alkyl of one to 12 carbon atoms or phenyl-lower alkyl and R.sup.4 is hydrogen or lower alkyl, and a pharmaceutically acceptable salts thereof are disclsoed. Said compounds (I) and salts thereof are useful as hypotensive agents.
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: April 2, 1985
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Naoto Yoneda, Jyoji Kato, Kimiaki Hayashi, Takashi Ochiai, Keizo Kinashi
  • 2-Oxoimidazolidine derivatives
    Patent number: 4380644
    Abstract: A 2-oxoimidazolidine derivative of the formula: ##STR1## wherein R.sup.1 is lower alkyl or phenyl-lower alkyl and R.sup.2 is lower alkyl or phenyl, and a process for preparation thereof are disclosed. Said 2-oxoimidazolidine derivative (I) or a pharmaceutically acceptable salt thereof is useful as a hypotensive agent.
    Type: Grant
    Filed: August 7, 1981
    Date of Patent: April 19, 1983
    Assignee: Tanabe Siyaku Co., Ltd.
    Inventors: Naoto Yoneda, Jyoji Kato, Keizo Kinashi
  • Tetrahydroisoquinoline compounds and a pharmaceutical composition thereof
    Patent number: 4294832
    Abstract: A tetrahydroisoquinoline compound of the formula: ##STR1## wherein R.sup.1 is alkyl of one to six carbon atoms, cycloalkyl of three to six carbon atoms, allyl or propargyl, R.sup.2 is hydrogen or alkyl of one to six carbon atoms, and R.sup.3 is hydrogen, alkyl of one to six carbon atoms or benzyl. Methods for preparing the compound (I) are disclosed. The compound (I) and a pharmaceutically acceptable salt thereof are useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: October 13, 1981
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Naoto Yoneda, Jyoji Kato, Keizo Kinashi