Patents by Inventor Kuniyoshi Takahar

Kuniyoshi Takahar 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).

  • Patent number: 5417917
    Abstract: A method for the preparation of an open cell porous metallic material is provided. The method includes first molding a metal oxide powder into a desired gas-permeable body, then firing the body to obtain a sintered body of metal oxide. Lastly, oxygen is removed from the sintered metal oxide by firing in a reducing atmosphere. In a preferred embodiment, metal oxides such as NiO are combined with polyvinyl alcohol (PVA) and compressed into a molded body which is then air-fired and reduced. Pore sizes of less than 1 .mu.m are characteristic. Porosity of up to 64 percent has been demonstrated for nickel. In another preferred embodiment, mixed systems of metal alloys are demonstrated. In particular, results are shown for a NiO--MoO.sub.3 system.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: May 23, 1995
    Assignee: Nihon Millipore Kabushiki Kaisha
    Inventors: Kuniyoshi Takahar, Kiyoshi Fukuura