Patents by Inventor Asako Harayama

Asako Harayama 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).

  • Filter for purifying hydrogen and method for manufacture thereof
    Patent number: 7662218
    Abstract: A hydrogen-purification membrane comprises a Pd alloy film joined to one surface of a porous support substrate. Each pore in the porous support substrate is such that between the thickness T of the porous support substrate, the opening diameter D1 of the pore on the side joined to the Pd alloy film and the opening diameter D2 of the pore on the opposite side, there are relations represented by 1.0?D1/T?5.0 and 1.0?D2/T?5.0, and between the opening diameter D1 of the pore on the side joined to the Pd alloy film, the opening diameter D2 of the pore on the opposite side and the opening diameter D3 of the narrowest portion of the pore there are relations represented by D3/D1<0.8, D3/D2<0.9 and D3<250 ?m. Furthermore, the total opening area of the pores on the side joined to the Pd alloy film accounts for 20 to 80% of the area of the porous support substrate.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: February 16, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takanori Maeda, Hiroshi Yagi, Asako Harayama
  • Filter for purifying hydrogen and method for manufacture thereof
    Publication number: 20070190302
    Abstract: A hydrogen-purification membrane comprises a Pd alloy film joined to one surface of a porous support substrate. Each pore in the porous support substrate is such that between the thickness T of the porous support substrate, the opening diameter D1 of the pore on the side joined to the Pd alloy film and the opening diameter D2 of the pore on the opposite side, there are relations represented by 1.0?D1/T?5.0 and 1.0?D2/T?5.0, and between the opening diameter D1 of the pore on the side joined to the Pd alloy film, the opening diameter D2 of the pore on the opposite side and the opening diameter D3 of the narrowest portion of the pore there are relations represented by D3/D1<0.8, D3/D2<0.9 and D3<250 ?m. Furthermore, the total opening area of the pores on the side joined to the Pd alloy film accounts for 20 to 80% of the area of the porous support substrate.
    Type: Application
    Filed: October 18, 2005
    Publication date: August 16, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takanori Maeda, Hiroshi Yagi, Asako Harayama