Patents by Inventor Naruo Yokoyama

Naruo Yokoyama 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: 5994611
    Abstract: The disclosure describes plastic formed products comprising:one selected from the group consisting of a thermoplastic resin and a thermosetting resin; and0.1 to 10 wt % of at least one selected from the group consisting of ferric oxide hydroxide particles, hematite particles, magnetite particles and maghemite particles;wherein (1) the average major axial diameter or the plate diameter of said ferric oxide hydroxide particles is 0.02 or 2.0 .mu.m and the average aspect ratio or the plate ratio thereof is 2 to 20, (2) the average particle size of said hematite particles, magnetite particles and maghemite particles is 0.01 to 1.0, the BET specific surface area thereof is 1 to 120 m.sup.2 /g and the water content on the surfaces thereof is not less than 0.02 wt %/m.sup.2 /g.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: November 30, 1999
    Assignee: Toda Kogyo Corporation
    Inventors: Masaharu Nishihara, Masaaki Nishikawa, Suminori Tanaka, Nanao Horiishi, Satoru Saito, Naruo Yokoyama, Kazuyuki Hayashi, Masayuki Watanabe
  • Patent number: 5900313
    Abstract: The disclosure describes plastic formed products comprising:one selected from the group consisting of a thermoplastic resin and a thermosetting resin; and0.1 to 10 wt % of at least one selected from the group consisting of ferric oxide hydroxide particles, hematite particles, magnetite particles and maghemite particles;wherein (1) the average major axial diameter or the plate diameter of said ferric oxide hydroxide particles is 0.02 or 2.0 .mu.m and the average aspect ratio or the plate ratio thereof is 2 to 20, (2) the average particle size of said hematite particles, magnetite particles and maghemite particles is 0.01 to 1.0, the BET specific surface area thereof is 1 to 120 m.sup.2 /g and the water content on the surfaces thereof is not less than 0.02 wt %/m.sup.2 /g.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: May 4, 1999
    Assignee: Toda Kogyo Corporation
    Inventors: Masaharu Nishihara, Masaaki Nishikawa, Suminori Tanaka, Nanao Horiishi, Satoru Saito, Naruo Yokoyama, Kazuyuki Hayashi, Masayuki Watanabe
  • Patent number: 5744690
    Abstract: The disclosure describes a method of incinerating combustible wastes comprising the step of incinerating said combustible wastes in the presence of a calcium compound and particles selected from the group consisting of iron oxide particles, ferric oxide hydroxide particles and mixed particles thereof.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: April 28, 1998
    Assignee: Toda Kogyo Corporation
    Inventors: Naruo Yokoyama, Satoru Saito, Suminori Tanaka, Masaharu Nishihara, Minoru Ohsugi
  • Patent number: 5120898
    Abstract: A solid strong acid catalyst useful for hydrocarbon reactions, especially for the skeletal isomerization of paraffinic hydrocarbons is provided by supporting sulfate (SO.sub.4) and at least one member selected from Group VIII metals on a support consisting of hydroxides and oxides of Group IV metals and Group III metals and mixtures thereof and then calcining and stabilizing the catalyst.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: June 9, 1992
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Shigeo Baba, Yukio Shibata, Takahiro Kawamura, Hideo Takaoka, Tsuguo Kimura, Kazuo Kousaka, Yoshihiro Minato, Naruo Yokoyama, Kozo Iida, Tetsuya Imai
  • Patent number: 5036035
    Abstract: A solid strong acid catalyst useful for hydrocarbon reactions, especially for the skeletal isomerization of paraffinic hydrocarbons is provided by supporting sulfate (SO.sub.4) and at least one member selected from Group VIII metals on a support consisting of hydroxides and oxides of Group IV metals and Group III metals and mixtures thereof and then calcining and stabilizing the catalyst.
    Type: Grant
    Filed: March 21, 1989
    Date of Patent: July 30, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Shigeo Baba, Yukio Shibata, Takahiro Kawamura, Hideo Takaoka, Tsuguo Kimura, Kazuo Kousaka, Yoshihiro Minato, Naruo Yokoyama, Kozo Iida, Tetsuya Imai
  • Patent number: 4780300
    Abstract: A process for methanol which comprises cracking 100 moles of methanol in admixture with 1 to 99 moles of water, thereby obtaining a gas containing hydrogen and carbon monoxide, is described. The process is preferably carried out using a catalyst which consists of a carrier comprising copper and chromium oxides with or without manganese oxide and/or barium oxide and a catalytic component of nickel oxide or a mixture of nickel oxide and a basic oxide.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: October 25, 1988
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Naruo Yokoyama, Tetsuya Imai, Hiroshi Fujita, Mitsuharu Murakami, Yoshio Miyairi, Mamoru Tamai
  • Patent number: 4656147
    Abstract: A method for recovering a denitrating catalyst for ammonia catalytic reduction which is characterized by treating the denitrating catalyst for ammonia catalytic reduction, in which a performance has deteriorated, with at least one selected from the group consisting of SO.sub.4.sup.2- compounds, sulfur compounds and sulfonic acid compounds in order to replenish the catalyst with a sulfur content.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: April 7, 1987
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kozo Iida, Tsuneo Nagano, Naruo Yokoyama, Yoshiaki Obayashi, Shigeaki Mitsuoka
  • Patent number: 4282115
    Abstract: A catalyst for the selective catalytic reduction of nitrogen oxides by the use of ammonia as a reducing agent composed of a catalytically active constituent on a carrier having a honeycomb or parallel plate structure, the carrier being prepared from a slurry of crystallized calcium silicate prepared by mixing silicic acid and lime and heating the mixture under pressure, the calcium silicate having the structure of xonotrite and the formula 6 CaO.6 SiO.sub.2. H.sub.2 O.
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: August 4, 1981
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masumi Atsukawa, Yoshihiko Nishimoto, Naruo Yokoyama, Toshikuni Sera
  • Patent number: 4186109
    Abstract: A catalyst for selective catalytic reduction of nitrogen oxides by use of ammonia as a reducing agent is prepared by mixing a silicic acid material with a lime material, heating the mixture under pressure to form a slurry of calcium silicate crystals, forming the slurry into a carrier, and then allowing the carrier to carry a catalytically active ingredient.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: January 29, 1980
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masumi Atsukawa, Yoshihiko Nishimoto, Naruo Yokoyama, Toshikuni Sera