Patents by Inventor Yutaka Yasiro

Yutaka Yasiro 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).

  • Alkali- and heat-resistant inorganic fiber
    Patent number: 4363878
    Abstract: The inorganic fiber of this invention comprising as major constituents______________________________________ % by weight ______________________________________ SiO.sub.2 40-50 CaO 0-10 MgO 15-25 Fe.sub.2 O.sub.3 + FeO 0-10 Al.sub.2 O.sub.3 5-15 MnO 2-15 ______________________________________(provided that the total amount of CaO, Fe.sub.2 O.sub.3, FeO and MnO is about 20% by weight) is excellent in alkali- and heat-resistances and is useful as a replacement of asbestos in asbestos-cement boards. Titanium oxide (TiO.sub.2) is contained in natural rocks or slags to be used for the meltable material as an impurity in the amount of about 2% by weight.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: December 14, 1982
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Osamu Yamamoto, Keishin Takehara, Yutaka Yasiro