Patents by Inventor Ryoichi Seki

Ryoichi Seki 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).

  • Publication number: 20120094134
    Abstract: [Subject] The present invention provides a poly-4-methyl-1-pentene resin composition having improved film strength and molding properties for various molded articles with maintaining release properties which are inherent in poly-4-methyl-1-pentene, and also provides molded articles formed from the resin composition. [Means for solving the subject] The subject is attained by the poly-4-methyl-1-pentene resin composition comprising 50 to 99 parts by weight of poly-4-methyl-1-pentene (A), 1 to 50 parts by weight of polyamide (B) and 0.1 to 30 parts by weight of modified poly-4-methyl-1-pentene (C) obtainable by graft modification with an ethylenic unsaturated bond-containing monomer, provided that the total amount of (A) and (B) is 100 parts by weight.
    Type: Application
    Filed: October 18, 2011
    Publication date: April 19, 2012
    Applicant: MITSUI CHEMICALS. INC.
    Inventors: Masahiro ENNA, Kazutoshi Fujihara, Yasuhito Tsugane, Yoshiaki Aso, Ryoichi Seki
  • Patent number: 4918130
    Abstract: An eraser comprises a styrene thermoplastic elastomer as a matrix with a hydrocarbon resin and a polyolefin included therein. The styrene thermoplastic elastomer is selected from the group which consists of styrene-butadiene copolymers, styrene-isoprene copolymers, styrene-ethylene-butylene copolymers and styrene-ethylene-propylene copolymers, and the hydrocarbon is a terpene resin or hydrogenated terpene resin, and the polyolefin is polyethylene or polypropylene.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: April 17, 1990
    Assignee: Buncho Corporation
    Inventors: Yosimi Kano, Koji Seki, Ryoichi Seki
  • Patent number: D653944
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: February 14, 2012
    Assignees: Asahi Group Holdings, Ltd., Showa Aluminum Can Corporation
    Inventors: Ryoichi Seki, Yoshio Hatsumi, Junichi Sato, Morihito Mishiba