Patents by Inventor Fujio Naka

Fujio Naka 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).

  • Optically active (S)-hydantoin derivative
    Publication number: 20060241163
    Abstract: (S)-(?)-5-hydroxy-1-methylhydantoin is useful as a drug having high safety. Since the compound of the present invention, (S)-(?)-5-hydroxy-1-methylhydantoin, rarely changes to the metabolite having high toxicity compared with the R-form and the racemate, it is preferred as an agent for renal failure especially when used for chronic renal insufficiency in a patient where toxic substances are not excreted, but are accumulated in the body due to disturbance of renal functions.
    Type: Application
    Filed: April 20, 2005
    Publication date: October 26, 2006
    Inventors: Kaoru Okamoto, Akira Ishii, Nobuhisa Okukado, Hirohide Matsuura, Fujio Naka