Patents by Inventor Yasunobu Isobe

Yasunobu Isobe 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).

  • Short fiber-containing polymer composition and method for controlling electrical resistance of the polymer composition
    Patent number: 5321071
    Abstract: The present invention provides a short-fiber containing composition inhibited from electrostatic charging and having practical insulating properties. This composition has a volume resistivity of 10.sup.5 -10.sup.13 .OMEGA.cm and comprises 10-40 parts by weight of at least one kind of short fibers having a volume resistivity of 10.sup.-1 -10.sup.3 .OMEGA.cm and 90-60 parts by weight of a polymer or comprises 10-40 parts by weight of a mixture comprising at least one kind of short fibers having a volume resistivity of less than 10.sup.-1 .OMEGA.cm and at least one kind of short fibers having a volume resistivity of 10.sup.-1 .OMEGA.cm or more and 90-60 parts by weight of a polymer. A method for controlling the polymer composition to 10.sup.5 -10.sup.13 .OMEGA.cm in volume resistivity is also provided.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: June 14, 1994
    Assignees: Nitto Boseki Co., Ltd., Kawasaki Steel Corporation, Mitsubishi Gas Chemical Company, Inc.
    Inventors: Eiji Fujisawa, Yasunobu Isobe, Hiroaki Shono