Patents by Inventor Michiaki Tominago

Michiaki Tominago 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).

  • Substituted piperazinyl oxindol compounds and cardiotonic compositions containing the same
    Patent number: 4737501
    Abstract: An oxindol compound of the formula (I) ##STR1## wherein A represents a lower alkylene group;R represents a hydrogen atom, a lower alkyl group, a phenyl-lower alkyl group, a phenoxy-lower alkyl group, a benzoyl-lower alkyl group, a lower alkoxycarbonyl group, a lower alkanoyl group, a benzoyl group which may be substituted with 1 to 3 of a lower alkyl group, a lower alkoxy group and a halogen atom on the benzene ring thereof, or a benzoyl group which is substituted with a lower alkylenedioxy group on the benzene ring thereof; andm and n, which may be the same or different, each represents an integer of 0 or 1, with proviso that when n is an integer of 1, then m is an integer of 1,when A is an ethylene group and m is an integer of 1, then R should not be 3,4,5-trimethoxybenzoyl group, and when A is a group of the formula: --C(R.sup.1)(R.sup.2)--(where R.sup.1 and R.sup.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: April 12, 1988
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Michiaki Tominago, Hidenori Ogawa, Takafumi Fujioka, Kazuyuki Nakagawa