Patents by Inventor Takeshi Wakasugi

Takeshi Wakasugi 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).

  • Publication number: 20210003544
    Abstract: This method of analyzing the phenylhydrazine content in a 3-methyl-1-phenyl-2-pyrazolin-5-one bulk drug involves: obtaining a first measured value by measuring the phenylhydrazine content of a standard solution that contains phenylhydrazine or a salt thereof, a first acidic water and a first water-soluble organic solvent, and that exhibits a phenylhydrazine concentration of 0.01 ?g/mL to 10 ?g/mL; obtaining a second measured value by measuring the phenylhydrazine content in a sample solution that contains a 3-methyl-1-phenyl-2-pyrazolin-5-one bulk drug, a second acidic water and a second water-soluble organic solvent; and detecting the phenylhydrazine content in the 3-methyl-1-phenyl-2-pyrazolin-5-one bulk drug on the basis of the first measured value and the second measured value.
    Type: Application
    Filed: February 27, 2019
    Publication date: January 7, 2021
    Inventors: Takeshi WAKASUGI, Aya SANO
  • Publication number: 20090318461
    Abstract: The present invention provides novel crystals of 5-methyl-2-(piperazin-1-yl)benzenesulfonic anhydrate and monohydrate. The present invention provides type I crystal and type II crystal of 5-methyl-2-(piperazin-1-yl)benzenesulfonic anhydrate, which show particular diffraction peaks in powder X-ray diffraction pattern, as well as type II crystal and type III crystal of 5-methyl-2-(piperazin-1-yl)benzenesulfonic monohydrate, which show particular diffraction peaks in powder X-ray diffraction pattern.
    Type: Application
    Filed: July 20, 2007
    Publication date: December 24, 2009
    Inventors: Chika Ohno, Takeshi Wakasugi, Katsuhiko Masuda