Patents by Inventor Norikatsu Higuchi

Norikatsu Higuchi 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 the production of cyclic siloxane
    Patent number: 6448360
    Abstract: A process for the production of a cyclic siloxane described by formula (R1(CH3)SiO)d comprising reacting in the presence of an alkali catalyst a siloxane mixture comprising a silane or a linear siloxane described by general formula HO(R1(CH3)SiO)bH and a cyclic siloxane described by general formula (R1(CH3)SiO)c, where R1 is an alkenyl group having 6 to 14 carbon atoms, b is an integer of one or greater, c is an integer of 3 or greater, and d is an integer of 3 or greater.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: September 10, 2002
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Tadashi Okawa, Junichi Maeshima, Norikatsu Higuchi, Takao Takemasa
  • Method for the continuous production of organopolysiloxane gum solution
    Patent number: 6211267
    Abstract: A highly productive method for the continuous production of homogeneous solutions of organopolysiloxane gums is carried out by mixing a solvent and an organopolysiloxane gum. It is characterized by using for mixing, a twin screw compounding extruder which is self-cleaning in which the extruder has at least 2 solvent feed ports downstream from the gum feed port and the internal pressure in the extruder is maintained at a value from 0.00981 to 0.981 MPa during the process.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: April 3, 2001
    Assignee: Dow Corning Toray Silicone, Ltd.
    Inventors: Fumitaka Suto, Hideyuki Mori, Norikatsu Higuchi, Norio Matsuda