Patents by Inventor Ryo Takeuchi

Ryo Takeuchi 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).

  • Production process of silicon carbide from organosilicon compounds
    Patent number: 5620934
    Abstract: Disclosed herein is a process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or absence of a catalyst, a process for the preparation of polyalkenylsilanes (some of which are high molecular compounds) by the anionic coordination polymerization, radical polymerization or ionic polymerization of the alkenylsilanes, and a process for the production of silicon carbide by using these polyalkenylsilanes as prepolymers.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: April 15, 1997
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masayoshi Itoh, Ryo Takeuchi, Kenji Iwata, Mineo Kobayashi
  • Preparation process of organo silicon compounds and production process of silicon
    Patent number: 5596117
    Abstract: A process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or absence of a catalyst. A process for the preparation of polyalkenylsilanes (some of which are novel high molecular compounds) by the anionic coordination polymerization, radical polymerization or ionic polymerization of the alkenylsilanes. A process for the production of silicon carbide by using these polyalkenylsilanes as prepolymers.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: January 21, 1997
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masayoshi Itoh, Ryo Takeuchi, Kenji Iwata
  • Preparation process of organosilicon compounds and production of silicon carbide
    Patent number: 5508363
    Abstract: Disclosed herein are a novel process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or absence of a catalyst, a process for the preparation of polyalkenylsilanes (some of which are novel high molecular compounds) by the anionic coordination polymerization, radical polymerization or ionic polymerization of the alkenylsilanes, and a process for the production of silicon carbide by using these polyalkenylsilanes as prepolymers.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: April 16, 1996
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masayoshi Itoh, Ryo Takeuchi, Kenji Iwata
  • Process for preparing organic silicon compound
    Patent number: 5041587
    Abstract: A process for preparing an organic silicon compound is here disclosed which comprises the step of reacting a halogenated hydrocarbon selected from the group consisting ##STR1## wherein each of X.sup.1 to X.sup.16 is selected from the group consisting of hydrogen, an alkyl group, alkenyl group, phenyl group, naphthyl group, alkoxy group, acyl group, alkylamino group and dialkylamino group having 1 to 20 carbon atoms which are unsubstituted or substituted and a halogen atom; and each of at least one of X.sup.1 to X.sup.4, at least one of X.sup.8 to X.sup.10 and at least one of X.sup.11 to X.sup.16 is a halogen atom,with a silane selected from the group consisting of SiH.sub.4, Si.sub.2 H.sub.6 and Si.sub.3 H.sub.8.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: August 20, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masayoshi Itoh, Kenji Iwata, Noriyuki Yanagawa, Tetsura Utsumi, Mineo Kobayashi, Ryo Takeuchi, Tomohiro Abe