Patents by Inventor Kyuji Katsuoka

Kyuji Katsuoka 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).

  • Ceramic fiber yarn, and a method of and a spinning machine for making the same
    Patent number: 5486497
    Abstract: The present invention relates to a ceramic fiber yarn, which has higher weaving and knitting performance. The ceramic fiber yarn comprises a group of filaments, the filaments being made by the steps of spinning mother liquid, which comprises colloidal silica and basic aluminum chloride, and firing, the filaments comprising 67-75 wt % of alumina and 25-33 wt % of silica and mainly having polycrystalline transition alumina, and is characterized in that: the loop strength of each the filament, which is measured by a wire having diameter of 0.5 mm, is at or greater than 2.5.times.10.sup.-2 N (N: Newton); and the crystal structure of the filament substantially changes to polycrystalline mullite after heating for 30 minutes at the temperature of 1,400.degree. C.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: January 23, 1996
    Assignee: Taimei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kyuji Katsuoka, Noriho Harumiya, Tadahiro Hashizume, Tadashi Kitahara