Patents by Inventor Hiroki Fujihira

Hiroki Fujihira 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).

  • Standard compound for immunoassay for dioxin and method of immunoassay for dioxin
    Patent number: 7211409
    Abstract: A compound of formula (1) and an immunoassay method for quantitative determination of dioxins in a sample using as a standard the compound of the following formula (1): wherein R1, R2, R3 and R4 may be the same or different and represent chlorine or hydrogen, n is an integer from 1 to 10, and Z represents an amino acid residue or peptide.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: May 1, 2007
    Assignees: Toyo Boseki Kabushiki Kaisha, Takuma Co., Ltd.
    Inventors: Shigeaki Nishii, Kazuhiro Matsui, Takuya Ishibashi, Masanori Oka, Hiroki Fujihira, Hirotsugu Mishima, Shizuo Kataoka
  • 2,4,5-trichlorophenoxyalkyl carboxylic acid and a method for determining dioxins using the same
    Patent number: 7166440
    Abstract: An immunoassay of dioxins using 2,4,5-trichlorophenoxyalkyl amide derivative represented by the following formula (II) as an antigen for a competitive immunoassay is provided: where n is an integer of 1 to 10, and Z is a carrier compound or a label. This compound is not toxic, and is specific to dioxins and can be conjugated with a wide range of dioxin isomers, so that a safe and simple assay of dioxins can be provided.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: January 23, 2007
    Assignee: Takuma Co., Ltd.
    Inventors: Hiroki Fujihira, Kohei Nakatani
  • Standard compound for immunoassay for dioxin and method of immunoassay for dioxin
    Publication number: 20060166296
    Abstract: A compound of formula (1) and an immunoassay method for quantitative determination of dioxins in a sample using as a standard the compound of the following formula (1): wherein R1, R2, R3 and R4 may be the same or different and represent chlorine or hydrogen, n is an integer from 1 to 10, and Z represents an amino acid residue or peptide.
    Type: Application
    Filed: August 18, 2003
    Publication date: July 27, 2006
    Inventors: Shigeaki Nishii, Kazuhiro Matsui, Takuya Ishibashi, Masanori Oka, Hiroki Fujihira, Hirotsugu Mishima, Shizuo Kataoka
  • 2,4,5-Trichlorophenoxyalkyl carboxylic acid and a method for determining dioxins using the same
    Publication number: 20040191846
    Abstract: An immunoassay of dioxins using 2,4,5-trichlorophenoxyalkyl amide derivative represented by the following formula (II) as an antigen for a competitive immunoassay is provided: 1
    Type: Application
    Filed: October 17, 2003
    Publication date: September 30, 2004
    Inventors: Hiroki Fujihira, Kohei Nakatani