Patents by Inventor Michio Narita

Michio Narita 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).

  • Methods for preparing conductive thermoplastic resin compositions and electric conductors
    Patent number: 6149848
    Abstract: A method for preparing a conductive thermoplastic resin composition or an electric conductor includes the step of kneading (a) conductive resin master batch pellets of conductive carbon black and a thermoplastic resin in which the conductive carbon black accounts for 5 to 50% by weight relative to the total amount 100 parts by weight of the conductive carbon black and the thermoplastic resin, (b) a thermoplastic resin in a weight ratio: (a+b)/(a) ranging from 1.01 to 1.5. This method permits the production of a conductive carbon black-containing conductive resin composition and an electric conductor which show stable conductivity even within a high resistance region (having a surface resistivity ranging from 10.sup.6 to 10.sup.16 .OMEGA.), wherein the control of the conductivity is difficult.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: November 21, 2000
    Assignee: Lion Corporation
    Inventors: Masayuki Makise, Michio Narita, Seiji Maeno, Hideo Komatsu
  • Method for preparing conductive thermoplastic resin compositions
    Patent number: 5876647
    Abstract: A method for preparing a conductive thermoplastic resin composition or an electric conductor includes the step of kneading (a) conductive resin master batch pellets of conductive carbon black and a thermoplastic resin in which the conductive carbon black accounts for 5 to 50% by weight relative to the total amount 100 parts by weight of the conductive carbon black and the thermoplastic resin, (b) a thermoplastic resin in a weight ratio: (a+b)/(a) ranging from 1.01 to 1.5. This method permits the production of a conductive carbon black-containing conductive resin composition and an electric conductor which show stable conductivity even within a high resistance region (having a surface resistivity ranging from 10.sup.6 to 10.sup.16 .OMEGA.), wherein the control of the conductivity is difficult.
    Type: Grant
    Filed: October 19, 1996
    Date of Patent: March 2, 1999
    Assignee: Lion Corporation
    Inventors: Masayuki Makise, Michio Narita, Seiji Maeno, Hideo Komatsu