Patents by Inventor Takayuki Amiya

Takayuki Amiya 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).

  • Super absorbent polymer composition
    Patent number: 6335398
    Abstract: A super absorbent polymer composition comprising a chelating compound (A) which has a site capable of forming a chelate with a copper ion and whose copper salt has a solubility in physiological saline at 25° C. of 0.01% by weight or less and a super absorbent polymer (B), wherein the chelating compound (A) is present in an amount of from 0.0001 to 30 parts by weight per 100 parts by weight of said super absorbent polymer (B).
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: January 1, 2002
    Assignee: Kao Corporation
    Inventors: Takayuki Amiya, Seiichi Miyanaga, Yoko Hanada
  • Process for producing improved super absorbent polymer
    Patent number: 5883158
    Abstract: A process for producing an improved super absorbent polymer is disclosed. The process comprises adding to a water-retained super absorbent polymer retaining 10 to 100 parts by weight of water per 100 parts by weight of the super absorbent polymer, (a) a polyfunctional compound having two or more reactive groups and selected from a hydrophilic polymer or a metallic compound in an amount of 0.005 to 5 parts by weight per 100 parts by weight of the super absorbent polymer, and (b) a crosslinking agent having two or more functional groups capable of reacting with the polyfunctional compound at a weight ratio of the polyfunctional compound to the crosslinking agent of 0.1 to 30; mixing; and allowing the mixture to react by heating.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: March 16, 1999
    Assignee: Kao Corporation
    Inventors: Hiromi Nambu, Akira Umada, Yoshihiko Watanabe, Tadashi Igarashi, Takayuki Amiya
  • Process for producing polymer particles with irregular shape
    Patent number: 5621055
    Abstract: A process for producing polymer particles with an irregular shape by polymerizing a water-soluble polymerizable monomer in a system comprising a hydrophobic organic solvent inert to the polymerization and an aqueous solution of the water-soluble polymerizable monomer, characterized in that the system further contains an anionic surfactant.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: April 15, 1997
    Assignee: Kao Corporation
    Inventors: Seiichi Miyanaga, Yoshimitsu Ina, Takahide Minami, Takayuki Amiya
  • Process for producing polymer particles with irregular shape by polymerizing a water-soluble polymerizable monomer
    Patent number: 5596056
    Abstract: The process of the present invention for producing polymer particles with an irregular shape by polymerizing a water-soluble polymerizable monomer in a system comprising a hydrophobic organic solvent inert to the polymerization and an aqueous solution of the water-soluble polymerizable monomer is characterized in that the system a glycoside compound having such a structure that the hydrogen atom of the hemiacetal bond in the compound has been substituted for a hydrophobic group, or a gluconamide compound as a dispersant.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: January 21, 1997
    Assignee: Kao Corporation
    Inventors: Hiromi Nambu, Takahide Minami, Takayuki Amiya, Akihiro Kondo
  • Propylene (co)polymer and process for the preparation of the same
    Patent number: 5328956
    Abstract: A propylene (co) polymer terminated with a reactive group and a process for the preparation of the same.A graft copolymer having a specific side chain and a process for the preparation of the same.The propylene (co) polymer is usable as a radial- or ion-polymerizable propylene macromonomer or as an intermediate for the preparation of a block polymer. Examples of the application thereof include compatibizing agent for polymers, light- or laser-curable plastic, viscosity index and surface modifier.The graft copolymer is useful as a surface modifier or compatibilizing agent for polypropylene or a dispersant for fillers.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: July 12, 1994
    Assignee: Kao Corporation
    Inventors: Yoshihiro Hasebe, Takayuki Amiya, Yutaka Yasuda
  • Bed material for cell culture
    Patent number: 5284766
    Abstract: Disclosed is a bed material whereby cultured or grown cells are collected or detached from the material without a proteolysis enzyme or chemical material. The bed material comprises a support and a coating thereon, wherein the coating is formed from a polymer or copolymer which has a critical solution temperature to water within the range of 0.degree. C. to 80.degree. C.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: February 8, 1994
    Assignees: Kao Corporation, Tokyo Women's Medical College
    Inventors: Teruo Okano, Kazunori Kataoka, Noriko Yamada, Yasuhisa Sakurai, Takayuki Amiya, Akira Mamada