Patents by Inventor Koichi Irako

Koichi Irako 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).

  • Process for producing a sintered cubic silicon carbide
    Patent number: 4742029
    Abstract: A process for producing a normal sintered cubic silicon carbide which comprises sintering cubic silicon carbide powder made up of crystallites of more than 480 .ANG. in size determined from the reflection in the (4 2 0) plane measured by the powder X-ray diffraction method.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: May 3, 1988
    Assignee: Bridgestone Corporation
    Inventors: Yasuo Kurachi, Katsuhiko Arai, Koichi Irako
  • Exhaust gas purifying catalyst
    Patent number: 4711870
    Abstract: A catalyst comprising (a) copper or a copper compound; (b) vanadium or a vanadium compound; (c) zirconium, aluminum, nickel, iron, manganese, lanthanum, chromium, zinc, lead, or cerium, or a compound thereof; and optionally, (d) platinum, rhodium, or palladium, or a compound thereof is carried on a porous ceramic body to assist in purifying exhaust gases from Diesel engines.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: December 8, 1987
    Assignee: Bridgestone Corporation
    Inventors: Chikara Yamada, Yoji Watabe, Koichi Irako, deceased, Yuichi Murakamai
  • Process for decomposing vulcanized rubber
    Patent number: 4426459
    Abstract: A process for decomposing vulcanized rubber which comprises swelling 100 parts by weight of vulcanized rubber with 10-3000 parts by weight of an organic solution, and adding and mixing 0.1-20 parts by weight of an organic hydroperoxide (a) and of 0.001-1 mole equivalent per said (a) of at least one member (b) selected from the group consisting of copper salts, cobalt salts, and strongly alkaline compounds.
    Type: Grant
    Filed: February 18, 1981
    Date of Patent: January 17, 1984
    Assignee: Bridgestone Tire Co., Ltd.
    Inventors: Yoji Watabe, Hideo Takeichi, Koichi Irako
  • Process for decomposing vulcanized rubber
    Patent number: 4305850
    Abstract: Vulcanized rubber is decomposed by treating 100 parts by weight of vulcanized rubber with a solution containing 1-30 parts by weight of a diacyl peroxide having decomposition temperature of 90.degree. C. or below and at least one member capable of swelling vulcanized rubber selected from the group consisting of solvents and radical-polymerizable monomers.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: December 15, 1981
    Assignee: Bridgestone Tire Co., Ltd.
    Inventors: Yoji Watabe, Hideo Takeichi, Akihiro Maebara, Arata Miyagi, Koichi Irako
  • Rubber mounting compositions
    Patent number: 4294732
    Abstract: Rubber compositions having excellent vibration isolating properties at a high hardness are produced by compounding 100 parts by weight of at least one of natural rubbers, diene rubbers and diene copolymeric rubbers or a rubber blend of these rubbers and a halogenated butyl rubber, 0.5-35 parts by weight of an oil modified phenol resin, a modified ratio of which is 20% or more, and 2-30 parts by weight based on said resin, of a hardening agent for the phenol resin and hardening the resulting mixture. The use of such rubber compositions is possible to make a rubber mounting to be a small size.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: October 13, 1981
    Assignee: Bridgestone Tire Company Limited
    Inventors: Tomio Ohyachi, Koichi Irako