Patents by Inventor Yuriko Fukuoka

Yuriko Fukuoka 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).

  • Water-soluble tetrazolium compounds
    Patent number: 7485705
    Abstract: The purpose of the present invention is to provide a water-soluble tetrazolium compound that will form a water-soluble formazan exhibiting long-wavelength absorption and is stable in aqueous solution for a long period and suitable for the quantitative analysis of dehydrogenases or substrates thereof. Disclosed is a water soluble tetrazolium compound expressed by the following general formula (1): wherein each of R1 to R19 independently represents hydrogen atom; nitro group; sulfonate group or alkyl, alkoxy, sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; provided that each of at least two of R1 to R19 independently represents sulfonate group; or sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; and M represents an alkali metal or ammonium ion.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: February 3, 2009
    Assignee: Dojindo Laboratories
    Inventors: Yuriko Fukuoka, Ryo Sakamoto, Munetaka Ishiyama
  • Water-soluble tetrazolium compounds
    Publication number: 20070111274
    Abstract: The purpose of the present invention is to provide a water-soluble tetrazolium compound that will form a water-soluble formazan exhibiting long-wavelength absorption and is stable in aqueous solution for a long period and suitable for the quantitative analysis of dehydrogenases or substrates thereof. Disclosed is a water soluble tetrazolium compound expressed by the following general formula (1): wherein each of R1 to R19 independently represents hydrogen atom; nitro group; sulfonate group or alkyl, alkoxy, sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; provided that each of at least two of R1 to R19 independently represents sulfonate group; or sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; and M represents an alkali metal or ammonium ion.
    Type: Application
    Filed: July 13, 2004
    Publication date: May 17, 2007
    Inventor: Yuriko Fukuoka