Patents by Inventor Hirokazu Iwahashi

Hirokazu Iwahashi 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).

  • Fluorescent agent having ethynyl group
    Patent number: 8168796
    Abstract: There are provided novel fluorescent agents, such as pyrazoline compounds represented by formula (I): (wherein R1, R2 and R3 are as defined in the specification), having an ethynyl group in the molecule, which have high absorptivity in the ultraviolet-visible short wavelength range (for example, 350 nm-420 nm).
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: May 1, 2012
    Assignee: Nippon Chemical Works Co., Ltd.
    Inventors: Kazuhiko Mizuno, Hideyuki Takagaki, Hirokazu Iwahashi, Kaname Inoue
  • FLUORESCENT AGENT HAVING ETHYNYL GROUP
    Publication number: 20100298573
    Abstract: There are provided novel fluorescent agents, such as pyrazoline compounds represented by formula (I): (wherein R1, R2 and R3 are as defined in the specification), having an ethynyl group in the molecule, which have high absorptivity in the ultraviolet-visible short wavelength range (for example, 350 nm-420 nm).
    Type: Application
    Filed: January 19, 2009
    Publication date: November 25, 2010
    Inventors: Kazuhiko Mizuno, Hideyuki Takagaki, Hirokazu Iwahashi, Kaname Inoue