Patents by Inventor Tooru Hiratuka

Tooru Hiratuka 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).

  • Inorganic fiber sinter and process for producing same
    Patent number: 5318860
    Abstract: An inorganic fiber sinter consists essentially of (a) an inorganic substance (I) selected from the group consisting of (i) an amorphous substance consisting essentially of Si, M, C and O, (ii) an agglomerate consisting essentially of crystalline ultrafine particles of .beta.-SiC, MC, a solid solution of .beta.-SiC with MC and/or MC.sub.1-x, and amorphous SiO.sub.2 and MO.sub.2, and (iii) a mixture of the above amorphous substance (i) and the agglomerate (ii), and (b) an inorganic substance (II) selected from the group consisting of (iv) an amorphous substance consisting essentially of Si, M and O, (v) a crystal agglomerate consisting essentially of crystalline SiO.sub.2 and MO.sub.2, and (iv) a mixture of the amorphous substance (iv) and the crystal agglomerate (v), wherein M is Ti or Zr and x is a number of more than 0 to less than 1.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: June 7, 1994
    Assignee: UBE Industries, Ltd.
    Inventors: Takemi Yamamura, Masaki Shibuya, Hideki Ohtsubo, Tooru Hiratuka