Patents by Inventor Yoshinao Tsuda

Yoshinao Tsuda 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).

  • Polyazaheterocycle compounds
    Patent number: 4918074
    Abstract: A polyazaheterocycle compound of the formula: ##STR1## or a pharmaceutically acceptable salt thereof, wherein each symbol is as defined in the specification.Said compounds exhibit calcium antagonistic and/or calcium agonistic activities.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: April 17, 1990
    Assignee: Yoshitomi Pharmaceutical Industries, Ltd.
    Inventors: Yoshinao Tsuda, Tadashi Mishina, Minoru Obata, Kazuhiko Araki, Jun Inui, Tadao Nakamura
  • 4,4-Diphenylcycloalkylpiperidines and psychotropic compositions thereof
    Patent number: 4076821
    Abstract: 4,4-Diphenylcyclohexylpiperidine compounds and their analogs of the formula: ##STR1## wherein the dotted line in Ring A indicates an optional bond; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently a hydrogen atom, a halogen atom, a trifluoromethyl group or a lower alkyl group; n is 1 or 2; m is 0 or 1; and Am is a piperidino group of the formula: ##STR2## where R.sup.5 and R.sup.6 are independently a hydrogen atom, a halogen atom, a trifluoromethyl group or a lower alkyl group, and the dotted line in Ring B indicates an optional bond;And pharmaceutically acceptable salts thereof are disclosed. They exhibit potent and long-lasting psychotropic effects.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: February 28, 1978
    Assignee: Yoshitomi Pharmaceutical Industries, Ltd.
    Inventors: Yoshinao Tsuda, Masafumi Arita, Toshio Hamasaki, Tatsumi Tsumagari, Takenori Kenjo