Patents by Inventor Hidehiko Kaji

Hidehiko Kaji 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).

  • Flame retarding polyolefin resin blend composition
    Patent number: 4234469
    Abstract: Flame retarded resin compositions are formed of specified quantities of polypropylene, polyethylene, inorganic filler and flame retarder such as an organic halide.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: November 18, 1980
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Yuzo Ohta, Norio Sugi, Osamu Isogai, Takahiro Hirai, Hidehiko Kaji
  • Resin compositions containing modified polypropylene
    Patent number: 4181689
    Abstract: A resin composition comprising a modified polypropylene obtained by reacting a polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator, another polyolefin and, if desired, an inorganic and/or an organic filler.The resin composition has excellent coating, adhesion and plating properties.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: January 1, 1980
    Assignee: Idemitsu Kosan Company, Ltd.
    Inventors: Kikuo Nagatoshi, Toshimichi Ito, Akio Inayoshi, Atsunobu Sakoda, Noriki Fujimoto, Hidehiko Kaji, Hirozo Sugahana
  • Process for production of resin compositions with excellent plating properties
    Patent number: 4111898
    Abstract: A process for producing a resin composition having excellent plating properties comprising heating a mixture consisting substantially of 100 parts by weight of a polyolefin resin, 5 to 150 parts by weight of an inorganic filler, 1 to less than 20 parts by weight of a liquid rubber, 0.1 to 10 parts by weight of an unsaturated carboxylic acid and 0.001 to 10 parts by weight of a radical generator at 110.degree. to 280.degree. C. in the absence of solvents.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: September 5, 1978
    Assignee: Idemitsu Kosan Company, Ltd.
    Inventors: Akio Inayoshi, Toshimichi Ito, Kikuo Nagatoshi, Toshihide Nara, Shinsuke Sagata, Hitomi Tomari, Noriki Fujimoto, Hidehiko Kaji
  • Process for production of modified polypropylene
    Patent number: 4078017
    Abstract: A process for producing modified polypropylene comprising reacting polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: March 7, 1978
    Assignee: Idemitsu Kosan Company, Ltd.
    Inventors: Kikuo Nagatoshi, Toshimichi Ito, Atsunobu Sakoda, Akio Inayoshi, Noriki Fujimoto, Hidehiko Kaji, Hirozo Sugahara
  • Pencils not requiring sharpening
    Patent number: 4019822
    Abstract: Pencils not requiring sharpening are produced by wrapping a thermoplastic resin sheet, which has been uniaxially stretched, around a core material so that a stretched direction of the sheet forms a spiral against the core material, whereby the sheet forms a holder for the pencil which may be stripped off to selectively expose the core material.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: April 26, 1977
    Assignee: Idemitsu, Kosan Kabushiki-Kaisha (Idemitsu Kosan Co., Ltd.)
    Inventors: Takeshi Matsumoto, Hidehiko Kaji, Osamu Isogai, Masami Tomikawa
  • Polyethylene composition
    Patent number: 3976612
    Abstract: A polyethylene composition consisting of: (A) a high density polyethylene with a viscosity-average molecular weight of 10 .times. 10.sup.4 to 20 .times. 10.sup.4, a number average molecular weight of 1 .times. 10.sup.4 or greater and a ratio between weight average molecular weight and number average molecular weight of 20 or less; (B) at least one inorganic calcium compound selected from a group consisting of calcium sulfite, calcium sulfate and calcium carbonate; and (C) a solid lubricant, if desired, the composition produces a film or sheet whose internal tearing resistance is high and equal in both longitudinal and lateral directions and the processibility of the resin composition may be extremely improved by incorporating as a fourth component, within a range of 1:5 to 5:1 in weight ratio with respect to the aforementioned high density polyethylene, a different high density polyethylene with a melt index of 0.1 to 1.0.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: August 24, 1976
    Assignee: Idemitsu, Kosan Kabushiki-Kaisha (Idemitsu Kosan Co., Ltd.)
    Inventors: Hidehiko Kaji, Takeshi Matsumoto, Norio Sugi, Atsuo Ikenaga, Shoichi Iwata, Masami Tomikawa