Patents by Inventor Oya Masayuki

Oya Masayuki 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).

  • 2-phenyl-1,4-benzothiazin-3-one derivatives
    Patent number: 4739050
    Abstract: This invention relates to 2-arylbenzothiazine derivatives of the formula[I] and salts thereof, process of preparation and therapeutic drug comprising them for circulatory diseases, ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are hydrogen, lower alkyl, hydroxy, lower alkoxy, acyloxy, tetrahydropyranyloxy, halogen, nitro, amino, lower alkylamino or ##STR2## and the lower alkoxy group may be substituted by halogen, formyl, lower alkoxy or epoxy;R.sup.3 is hydrogen or lower alkyl;R.sup.4 is hydrogen, lower alkyl, cycloalkyl, hydroxy, lower alkoxy, mercapto, lower alkylthio, arylthio, halogen, cyano, formyl-lower alkyl, lower alkoxy-lower alkyl or ##STR3## R.sup.5,R.sup.6,R.sup.7 and R.sup.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: April 19, 1988
    Assignee: Santen Pharmaceutical Co., Ltd.
    Inventors: Iwao Jun-ichi, Iso Tadashi, Oya Masayuki