Patents by Inventor Nobuo Kosaka

Nobuo Kosaka 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).

  • Triphenylmethane derivatives
    Patent number: 5413997
    Abstract: A triphenylmethane derivative represented by the following general formula: ##STR1## exhibits bone absorption inhibiting effects and is useful as a medicament for treating osteoporosis.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: May 9, 1995
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Iwao Kinoshita, Daisuke Machii, Yasuo Onoda, Haruki Takai, Nobuo Kosaka, Katsuichi Shuto, Katsushige Gomi, Makoto Morimoto, Akio Ishii
  • Pyridine derivatives
    Patent number: 5374634
    Abstract: There is provided a pyridine derivative represented by the formula (I) ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents hydrogen or lower alkyl and each of R.sup.3 and R.sup.4 independently represents hydrogen, lower alkyl, alicyclic alkyl, substituted or unsubstituted polycyclic alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic group, or R.sup.3 and R.sup.4 are combined with nitrogen atom adjacent thereto to form a substituted or unsubstituted alicyclic heterocyclic group, or pharmaceutically acceptable salt thereof. The pyridine derivative exhibits bone resorption inhibiting effect and is useful as a medicament for treating osteoporosis.
    Type: Grant
    Filed: July 1, 1993
    Date of Patent: December 20, 1994
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Iwao Kinoshita, Yasuo Onoda, Haruki Takai, Nobuo Kosaka, Akio Ishii, Joji Nakamura, Hiroyuki Ishida, Katsushige Gomi