Patents by Inventor Tadashi Nagatani

Tadashi Nagatani 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).

  • Patent number: 5621103
    Abstract: A tetrahydropyridine derivative having substituents on three rings represented by the following formula (1): ##STR1## (wherein A represents sulfur atom, sulfoxide group or sulfone group; R.sub.1 represents an amino group substituted with a specific substituent or a specific aliphatic oxy group; R.sub.2 and R.sub.3 each represents hydrogen atom or a hydroxy group; and m and n are each an integer of from 0 to 4; provided that when m and n are 2 or above, R.sub.2 's and R.sub.3 's may be either the same or different from each other respectively, that when A is sulfur atom and R.sub.1 is cyclohexylamino group and R.sub.2 is hydrogen atom, R.sub.3 is hydroxy group, that when A is sulfoxide group and R.sub.1 is cyclohexylamino group or 4-hydroxycyclohexylamino group, R.sub.2 is hydrogen atom and R.sub.3 is hydrogen atom or hydroxy group and that when A is sulfone group and R.sub.1 is cyclohexylamino group, R.sub.2 and R.sub.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: April 15, 1997
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hiromu Kawakubo, Tadashi Nagatani, Showa Ueki, deceased
  • Patent number: 5126448
    Abstract: This invention relates to novel pyridine derivatives and 1,2,3,4-tetrahydropyridine derivatives shown by following general formula (I) or (II) and salts thereof which are useful as psychotropic medicaments: ##STR1## wherein A is S or O; R.sub.1 represents an unsubstituted or substituted alkoxy, amino, hydrazino, or 6- or 7-membered heterocyclic group having one or two nitrogen atoms with the proviso that R.sub.1 is not an alkoxy group in formula (I); R.sub.2 and R.sub.3 each represents a hydrogen atom or an unsubstituted or substituted alkyl, aryl, alkenyl, acyl, arylcarbonyl group; and m and n each represents an integer of from 0 to 4.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: June 30, 1992
    Assignee: Asahi Kasei Kogyo K.K.
    Inventors: Showa Ueki, Hiromu Kawakubo, Katsuya Okazaki, Tadashi Nagatani