Patents by Inventor Shinji Aki

Shinji Aki 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).

  • 1-cyclopropyl-6-fluoro-8-alkyl-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid derivatives
    Patent number: 4855292
    Abstract: Novel 4-oxoquinoline-3-carboxylic acid compounds of the formula: ##STR1## wherein R.sup.2 is 1-pyrrolidinyl which may have 1 to 2 substituents selected from the group consisting of (i) C.sub.1 -C.sub.6 alkyl, (ii) amino-(C.sub.1 -C.sub.6)alkyl, said amino being optionally substituted by 1 or 2 substituents selected from C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkanoyl, and C.sub.1 -C.sub.6 alkoxycarbonyl, (iii) amino which may be substituted by 1 or 2 substituents selected from C.sub.1 -C.sub.6 alkyl, phenyl(C.sub.1 -C.sub.6)alkyl, C.sub.1 -C.sub.6 alkoxycarbonyl, and C.sub.1 -C.sub.6 alkanoyl, and (iv) 2-oxo-1,3-dioxolenemethylamino which is substituted by C.sub.1 -C.sub.6 alkyl; or 1-piperidinyl which may have 1 to 3 substituents selected from oxo, hydroxy, halogen and C.sub.1 -C.sub.6 alkyl, and R.sup.3 is C.sub.1 -C.sub.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: August 8, 1989
    Assignee: Otsuka Pharmaceutical Company, Limited
    Inventors: Hiraki Ueda, Hisashi Miyamoto, Shinji Aki, Tatsuya Otsuka