Patents by Inventor Naohiro Tsukamoto

Naohiro Tsukamoto 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).

  • Isoxazolopyridone derivatives and their use
    Patent number: 7053219
    Abstract: The invention relates to isoxazolopyridone derivatives of a formula (I-a): wherein R1a represents an optionally-substituted heteroaryl or phenyl group, R2a represents an optionally-substituted phenyl or heteroaryl group, and R3a represents a methyl group, provided that, (1) when R1a is an unsubstituted phenyl group, then R2a must not be a para-substituted phenyl group of which the substituent is any of a methoxy group, a chloro group, a methyl group, a trifluoromethyl group, a fluoro group, a bromomethyl group or a dimethylaminomethyl group, and R2a must not be an unsubstituted heteroaryl group, and (2) when R1a is a 4-tolyl group or a 4-fluorophenyl group, then R2a must not be an unsubstituted phenyl group, a 4-methoxyphenyl group or a 4-fluorophenyl group, or their pharmaceutically-acceptable salts.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: May 30, 2006
    Assignee: Banyu Pharmaceutical Co. Ltd.
    Inventors: Masayuki Nakamura, Hideki Kurihara, Mitsuru Ohkubo, Naohiro Tsukamoto
  • Novel isoxazolopyridone derivatives and their use
    Publication number: 20040176407
    Abstract: The invention relates to isoxazolopyridone derivatives of a formula (I-a): 1
    Type: Application
    Filed: December 10, 2003
    Publication date: September 9, 2004
    Inventors: Masayuki Nakamura, Hideki Kurihara, Mitsuru Ohkubo, Naohiro Tsukamoto