Patents by Inventor Tami Hiruta

Tami Hiruta 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).

  • Method and apparatus for analysis of poly (biphenyl chloride) in electrical insulating oil
    Patent number: 8562910
    Abstract: An object of the present invention is to provide a method and an apparatus by which PCBs in insulating oil can be analyzed with high accuracy in a convenient, inexpensive, and rapid manner. The method for analyzing polychlorobiphenyls by measuring the concentration of polychlorobiphenyls in insulating oil comprises a step of, as pretreatment, bringing particles of a copolymer that contains divinylbenzene and a methacrylate organic monomer as monomer components into contact with insulating oil containing polychlorobiphenyls, so as to separate polychlorobiphenyls in insulating oil from oil content that is an impurity. The methacrylate organic monomer preferably has a diol type hydroxyl group.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: October 22, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Masako Kawarai, Junkichi Miura, Tami Hiruta, Yoshinori Inoue
  • METHOD AND APPARATUS FOR ANALYSIS OF POLY (BIPHENYL CHLORIDE) IN ELECTRICAL INSULATING OIL
    Publication number: 20110126609
    Abstract: An object of the present invention is to provide a method and an apparatus by which PCBs in insulating oil can be analyzed with high accuracy in a convenient, inexpensive, and rapid manner. The method for analyzing polychlorobiphenyls by measuring the concentration of polychlorobiphenyls in insulating oil comprises a step of, as pretreatment, bringing particles of a copolymer that contains divinylbenzene and a methacrylate organic monomer as monomer components into contact with insulating oil containing polychlorobiphenyls, so as to separate polychlorobiphenyls in insulating oil from oil content that is an impurity. The methacrylate organic monomer preferably has a diol type hydroxyl group.
    Type: Application
    Filed: May 20, 2009
    Publication date: June 2, 2011
    Inventors: Masako Kawarai, Junkichi Miura, Tami Hiruta, Yoshinori Inoue