Patents by Inventor Kimihisa Ueno

Kimihisa Ueno 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).

  • 5-aminoflavone derivatives
    Patent number: 5539112
    Abstract: 5-Aminoflavone derivatives represented by the formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and represent hydrogen, substituted or unsubstituted lower alkyl, lower alkenyl, halogen-substituted or unsubstituted lower alkanoyl or lower alkoxycarbonyl, X.sup.1, X.sup.2, Y.sup.1 and Y.sup.2 are the same or different and represent hydrogen, halogen or lower alkyl, at least one of X.sup.1 and X.sup.2 represents halogen or lower alkyl, X.sup.3 represents hydrogen, substituted or unsubstituted lower alkyl, lower alkenyl, lower alkynyl, halogen, hydroxy, substituted or unsubstituted lower alkoxy, NR.sup.5 R.sup.6 (wherein R.sup.5 and R.sup.6 are the same or different and represent hydrogen, or substituted or unsubstituted lower alkyl, or R.sup.5 and R.sup.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 23, 1996
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Tsutomu Akama, Shun-ichi Ikeda, Yasushi Shida, Masaji Kasai, Hiroyuki Ishida, Uichiro Kimura, Katsushige Gomi, Hiromitsu Saito, Kimihisa Ueno