Patents by Inventor Kenzi Saeki

Kenzi Saeki 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).

  • 6-substituted alkoxy-2-oxo-1,2-dihydroquinoxaline derivatives
    Patent number: 4870175
    Abstract: A compound of the formula ##STR1## wherein Z is N or NH, is a single or double bond, R.sub.1 is hydrogen, C.sub.1-20 alkyl or optionally substituted phenyl, A is lower alkylene, R is carboxyl, lower alkoxycarbonyl, ##STR2## or 1-cycloalkyl-tetrazole-5-yl, R.sub.2 is lower alkyl, hydroxy-lower alkyl or optionally substituted phenyl-lower alkyl, R.sub.3 is lower alkyl or cycloalkyl, or R.sub.2 and R.sub.3 together constitute ##STR3## and R.sub.5 and R.sub.6 are hydrogen or optionally substituted phenyl, or a pharmacologically acceptable salt thereof, has platelet aggregation inhibitory activity and/or cyclic AMP/phosphodiesterase inhibitory activity.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: September 26, 1989
    Assignee: Toyo Jozo Kabushiki Kaisha
    Inventors: Yukio Suzuki, Masao Yaso, Katumi Nisimura, Kenzi Saeki, Noriyasu Takayanagi, Tetsu Saito, Eiichi Hayashi