Patents by Inventor Tomohiko Eiraku

Tomohiko Eiraku 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).

  • PYRIDAZINONE DERIVATIVE AND PDE INHIBITOR CONTAINING THE SAME AS ACTIVE INGREDIENT
    Publication number: 20100160335
    Abstract: It is to provide a novel pyridazinone derivative represented by the following general formula (1), which is useful as a pharmaceutical and has a phosphodiesterase inhibitory action: wherein R1 represents H or C1-6 alkyl, each of R2 and R3 represents H, X, C1-6 alkoxy, Z represents O or S, and A represents AA or BB, wherein AA represents: and BB represents: wherein R4 represents H or C1-6 alkyl, and each of R5 and R6 represents C1-6 alkyl.
    Type: Application
    Filed: June 18, 2008
    Publication date: June 24, 2010
    Inventors: Yasushi Kohno, Koji Ochiai, Satoshi Takita, Akihiko Kojima, Tomohiko Eiraku, Tetsuya Kishi