Patents by Inventor Yukuo Eguchi

Yukuo Eguchi 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).

  • 4(3H)-Quinazolinone derivatives, process for production thereof, and pharmaceutical compositions comprising said compounds
    Patent number: 4451467
    Abstract: The 4(3H)-quinazolinone compounds of the formula (I) ##STR1## wherein R.sub.1 and R.sub.3, independently from each other, represent a lower alkyl group;R.sub.2 represents a lower alkoxycarbonyl group;Q represents a phenyl group or a substituted phenyl group substituted by at least one member selected from the group consisting of halogen atoms, lower alkyl groups, lower alkoxy groups, di(lower)-alkylamino groups, a methylenedioxy group, a trifluoromethyl group, a hydroxyl group, and a nitro group;R.sub.4 represents a hydrogen atom or a lower alkyl group;R.sub.
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: May 29, 1984
    Assignee: Masayuki Ishikawa
    Inventors: Masayuki Ishikawa, Yukuo Eguchi, Soyao Moriguchi, Hisashi Ebisawa
  • Quinazolinde-dione compounds, process for production thereof and pharmaceutical use thereof
    Patent number: 4405623
    Abstract: A 5,6,7-substituted-2,4(1H,3H)-quinazolinedione compound of the formula (I), ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, A and B are as defined in claim 1 and its acid addition salt; and a vasodilating and hypotensive composition containing the aforesaid compound.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: September 20, 1983
    Assignee: Masayuki Ishikawa
    Inventors: Masayuki Ishikawa, Akiko Sugimoto, Yukuo Eguchi, Fujinori Sasaki, Hisashi Ebisawa, Soyao Moriguchi, Katsuhiko Gotoh
  • 1-Phthalazone derivatives, and use thereof
    Patent number: 4293553
    Abstract: Novel 1-phthalazone derivatives of the following formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined in claim 1, and pharmaceutically acceptable acid addition salts thereof; a process for production thereof; a pharmaceutical composition containing said compound; and a method for treating a thrombotic disease using said compound.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: October 6, 1981
    Assignee: Masayuki Ishikawa
    Inventors: Masayuki Ishikawa, Hiromichi Tanaka, Yukuo Eguchi, Shigeru Ito, Yoshimi Takashima, Masahiko Kobayashi
  • 3-Aromatic moiety substituted-4(3H)-quinazolinones, process for production thereof, and use thereof
    Patent number: 4276295
    Abstract: Novel 3-aromatic moiety substituted-4(3H)-quinazolinone derivatives useful as a vasodilators, hypotensive and antiatherosclerotic agents having the formula of ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Q are as defined in the accompanying specification or its acid addition salt; and a process for producing the same.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: June 30, 1981
    Assignee: Masayuki Ishikawa
    Inventors: Masayuki Ishikawa, Hiromichi Tanaka, Yukuo Eguchi, Shigeru Ito, Yoshimi Takashima, Masahiko Kobayashi