Patents by Inventor Takehisa Nakanishi

Takehisa Nakanishi 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).

  • Preparation process of thermoplastic resin composite
    Patent number: 5478888
    Abstract: The present invention relates to a process for the preparation of a thermoplastic resin composite comprising conducting polycondensation of a monomer material in a solution of an organic solvent containing an organic solvent soluble polymer to form an aromatic condensation polymer which is insoluble in said organic solvent and a thermoplastic resin composite prepared by the process.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: December 26, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Naoya Ogata, Takehisa Nakanishi, Tadashi Asanuma
  • Preparation process of thermoplastic resin composite
    Patent number: 5321087
    Abstract: The present invention relates to a process for the preparation of a thermoplastic resin composite comprising conducting polycondensation of a monomer material in a solution of an organic solvent containing an organic solvent soluble polymer to form an aromatic condensation polymer which is insoluble in said organic solvent and a thermoplastic resin composite prepared by the process.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: June 14, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Naoya Ogata, Takehisa Nakanishi, Tadashi Asanuma
  • Method for preparing epichlorohydrins
    Patent number: 5011953
    Abstract: Disclosed herein is a method for preparing epichlorohydrins by reacting allyl chlorides with an alkyl hydroperoxide in the presence of a modified catalyst formed by substituting specific substituents for 1 to 50% of the silanol groups of a catalyst having titanium atoms bound to a silicon dioxide carrier via oxygen atoms and having on the same carrier 1 to 6 silanol groups per square nanometer thereof.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: April 30, 1991
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Takehisa Nakanishi, Eiji Koga, Isao Fukada
  • Preparation process for aromatic hydroxycarboxylic acid
    Patent number: 4950781
    Abstract: A process for the preparation of aromatic hydroxycarboxylic acids by reacting alkali metal salts of phenol with carbon dioxide in organic phosphine oxides containing straight or branched alkyl groups having from 1 to 8 carbon atoms and phenyl groups.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: August 21, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Takehisa Nakanishi, Toshizumi Miura, Masao Hashimoto
  • Method for preparing epichlorohydrins
    Patent number: 4876372
    Abstract: The present invention is directed to a method for preparing epichlorohydrins by epoxidizing allyl chlorides with an organic hydroperoxide, and the epoxidation reaction is performed in the presence of a catalyst having titanium atoms bound to a silicon dioxide carrier and having silanol groups on the same carrier, whereby epichlorohydrins are obtained in high yield.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: October 24, 1989
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Takehisa Nakanishi, Eizi Koga, Isao Fukada