Patents by Inventor Mayumi Takayama

Mayumi Takayama 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).

  • Composite particles, method for producing composite particles, and use thereof
    Patent number: 10876010
    Abstract: In a method for producing composite particles containing polymer particles and silica particles that adhere to the polymer particles, the composite particles are obtained by subjecting a polymerizable monomer to aqueous suspension polymerization in a presence of silica particles and a cellulose compound adsorbing onto the silica particles. The composite particles contain the polymer particles, the silica particles that adhere to surfaces of the polymer particles, and the water-soluble cellulose compound.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: December 29, 2020
    Assignee: SEKISUI KASEI CO., LTD.
    Inventors: Toshiki Takenaka, Mayumi Takayama, Akiyoshi Kusaka, Masaaki Nakamura
  • COMPOSITE PARTICLES, METHOD FOR PRODUCING COMPOSITE PARTICLES, AND USE THEREOF
    Publication number: 20190055425
    Abstract: In a method for producing composite particles containing polymer particles and silica particles that adhere to the polymer particles, the composite particles are obtained by subjecting a polymerizable monomer to aqueous suspension polymerization in a presence of silica particles and a cellulose compound adsorbing onto the silica particles. The composite particles contain the polymer particles, the silica particles that adhere to surfaces of the polymer particles, and the water-soluble cellulose compound.
    Type: Application
    Filed: October 19, 2018
    Publication date: February 21, 2019
    Applicant: SEKISUI PLASTICS CO., LTD.
    Inventors: Toshiki TAKENAKA, Mayumi TAKAYAMA, Akiyoshi KUSAKA, Masaaki NAKAMURA
  • COMPOSITE PARTICLES, METHOD FOR PRODUCING COMPOSITE PARTICLES, AND USE THEREOF
    Publication number: 20160280936
    Abstract: In a method for producing composite particles containing polymer particles and silica particles that adhere to the polymer particles, the composite particles are obtained by subjecting a polymerizable monomer to aqueous suspension polymerization in a presence of silica particles and a cellulose compound adsorbing onto the silica particles. The composite particles contain the polymer particles, the silica particles that adhere to surfaces of the polymer particles, and the water-soluble cellulose compound.
    Type: Application
    Filed: November 13, 2013
    Publication date: September 29, 2016
    Inventors: Toshiki TAKENAKA, Mayumi TAKAYAMA, Akiyoshi KUSAKA, Masaaki NAKAMURA
  • Ferrofluid having improved oxidation resistance
    Patent number: 5879580
    Abstract: The present invention relates to a ferrofluid composition having improved oxidation resistance, which contains a carrier liquid, magnetic particles in a stable colloidal suspension, and from more than about 10% to about 400% by weight of an antioxidant based on the weight of the magnetic particles.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: March 9, 1999
    Assignee: Ferrotec Corporation
    Inventors: Shiro Tsuda, Mayumi Takayama
  • Ferrofluid having improved oxidation resistance
    Patent number: 5656196
    Abstract: The present invention relates to a ferrofluid composition having improved oxidation resistance, which contains a carrier liquid, magnetic particles in a stable colloidal suspension, and from about 5% to about 50% by weight of an antioxidant.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: August 12, 1997
    Assignee: Ferrotec Corporation
    Inventors: Shiro Tsuda, Mayumi Takayama