Patents by Inventor Ken Akamatsu

Ken Akamatsu 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).

  • Patent number: 11326032
    Abstract: Provided is a polyamide film which is a stretched film including a polyamide resin composition containing 1 to 10% by mass of a polyester thermoplastic elastomer, wherein the polyamide film satisfies all of the following conditions (A) to (C): (A) elastic moduli in MD and TD of the film are each 1.0 to 2.3 GPa; (B) a ratio between the elastic moduli in MD and TD of the film (MD/TD) is 0.9 to 1.5; and (C) a haze of the film is 7% or less.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: May 10, 2022
    Assignee: Unitika Ltd.
    Inventors: Takayoshi Okuzu, Akiko Hamamoto, Ken Akamatsu
  • Publication number: 20210179843
    Abstract: A polyester film comprises a polyester (A) composed mainly of polybutylene terephthalate and a polyester (B) composed mainly of polyethylene terephthalate, wherein a mass ratio (A/B) between the polyesters (A) and (B) is 70/30 to 55/45, a dry heat shrinkage rate (A) through heat treatment at 160° C. for 30 minutes is 20% or less in any of four directions on a film surface (0°, 45°, 90° and 135®), a difference between a maximum value and a minimum value of these dry heat shrinkage rates is 5% or less, a dry heat shrinkage rate (B) through heat treatment at 200° C. for 15 minutes is 35% or less in any of the four directions, a difference between a maximum value and a minimum value of these dry heat shrinkage rates is 5% or less, and a thickness variation in the four directions is 10% or less.
    Type: Application
    Filed: September 5, 2019
    Publication date: June 17, 2021
    Applicant: UNITIKA LTD.
    Inventors: Takayoshi Okuzu, Ken Akamatsu, Akiko Hamamoto, Hiroshi Ashihara, Goro Araki, Akito Kajita
  • Publication number: 20200392298
    Abstract: Provided is a polyamide film which is a stretched film including a polyamide resin composition containing 1 to 10% by mass of a polyester thermoplastic elastomer, wherein the polyamide film satisfies all of the following conditions (A) to (C): (A) elastic moduli in MD and TD of the film are each 1.0 to 2.3 GPa; (B) a ratio between the elastic moduli in MD and TD of the film (MD/TD) is 0.9 to 1.5; and (C) a haze of the film is 7% or less.
    Type: Application
    Filed: December 26, 2018
    Publication date: December 17, 2020
    Applicant: UNITIKA LTD.
    Inventors: Takayoshi Okuzu, Akiko Hamamoto, Ken Akamatsu
  • Patent number: 10286597
    Abstract: The present invention provides a polyester film, wherein an arbitrary direction on the film surface is defined to have an angle of 0°, and three directions are defined to have angles of 45°, 90°, and 135°, respectively, clockwise from the 0° direction, and the difference between the maximum value and the minimum value of the stresses at 5% elongation in the four directions is 50 MPa or less, the difference between the maximum value and the minimum value of the stresses at 15% elongation in the four directions is 70 MPa or less, and the modulus of elasticity in any one of the four directions falls within a range from 2.0 to 3.5 GPa.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: May 14, 2019
    Assignee: Unitika Ltd.
    Inventors: Ken Akamatsu, Masami Matsumoto
  • Publication number: 20180272594
    Abstract: The present invention provides a polyester film, wherein an arbitrary direction on the film surface is defined to have an angle of 0°, and three directions are defined to have angles of 45°, 90°, and 135°, respectively, clockwise from the 0° direction, and the difference between the maximum value and the minimum value of the stresses at 5% elongation in the four directions is 50 MPa or less, the difference between the maximum value and the minimum value of the stresses at 15% elongation i,n the four directions is 70 MPa or less, and the modulus of elasticity in any one of the four directions falls within a range from 2.0 to 3.5 GPa.
    Type: Application
    Filed: October 3, 2016
    Publication date: September 27, 2018
    Applicant: UNITIKA LTD.
    Inventors: Ken Akamatsu, Masami Matsumoto
  • Publication number: 20030104989
    Abstract: Polymers derived from polymers represented by Formula (A) (d is 20˜500; and Rs, which may be the same or different, represent each H, alkyl or benzyl) by substituting a part or all of the consisting peptide bonds by (1) hydrazino-Glu (Formula B), and saccharide-modified Glu (Formula C) or by (2) hydorazino-Glu (Formula B), and saccharide-modified Glu (Formula C), and drug bonded Glu (Formula D). These polymers, which are carriers optionally bonded to drugs capable of migrating into target organs (cells), are useful as medicines.
    Type: Application
    Filed: October 30, 2002
    Publication date: June 5, 2003
    Applicant: ONO PHARMACEUTICAL CO., LTD.
    Inventors: Mitsuru Hashida, Ken Akamatsu
  • Patent number: 6500916
    Abstract: Polymers derived from polymers represented by Formula (A) (d is 20˜500; and Rs, which may be the same or different, represent each H, alkyl or benzyl) by substituting a part or all of the consisting peptide bonds by (1) hydrazino-Glu (Formula B), and saccharide-modified Glu (Formula C) or by (2) hydorazino-Glu (Formula B), and saccharide-modified Glu (Formula C), and drug bonded Glu (Formula D).
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: December 31, 2002
    Assignee: Ono Pharmaceutical Co., Ltd.
    Inventors: Mitsuru Hashida, Ken Akamatsu