Patents by Inventor Hisanaga Shimizu

Hisanaga Shimizu 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: 6362269
    Abstract: A resin composition comprising 100 parts by weight of a resin component selected from (a) an aromatic polycarbonate resin (A-1 component) obtained by melt polymerization and, when measured for fluorescent spectrum at an exciting wavelength of 320 nm, having a relative fluorescence intensity of 4×10−3 or less at 465 nm relative to a standard substance, (b) a resin mixture of said A-1 component and a styrene-based resin (A-2 component), and (c) a resin mixture of said A-1 component and an aromatic polyester resin (A-3 component), and 5 to 200 parts by weight of a reinforcing filler. This resin composition gives a molded article superior in wet heat fatigue and various physical properties.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: March 26, 2002
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Koji Ishihata, Hisanaga Shimizu, Tetsushi Ono, Makoto Takagi
  • Patent number: 5444114
    Abstract: According to the present invention there is provided a thermoplastic resin composition comprising an aromatic polycarbonate resin, potassium titanate and an organic acid. This resin composition can be advantageously used for molding large parts for precision machines and large parts for automobiles.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: August 22, 1995
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Hisanaga Shimizu, Shinji Takeshita, Kazuo Kitamura
  • Patent number: 5013776
    Abstract: A flame-retardant polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin and 0.001 to 5.0 parts by weight of at least one metal salt of an organic phosphoric acid ester represented by the following general formula [I] ##STR1## wherein R.sub.1 and R.sub.2, independently from each other, represent an alkyl or aryl group which is substituted or unsubstituted by halogen, at least one of R.sub.1 and R.sub.2 is an aryl group and when both R.sub.1 and R.sub.2 are aryl groups, they may be bonded to each other either directly or through an alkylene group or may form one fused ring, and M represents an alkali metal, and optionally 0.01 to 2.0 parts by weight of a micro-fibrous polytetrafluoroethylene.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: May 7, 1991
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Kouji Ishihata, Youichi Hironaka, Hisanaga Shimizu, Kazuo Kitamura, Takeshi Imagawa