Patents by Inventor Nobuhiro Natsuyama

Nobuhiro Natsuyama 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).

  • Laminated product and process for producing the same
    Publication number: 20060073351
    Abstract: A laminated product comprising (i) a layer containing a sulfur-vulcanized rubber composition, and (ii) a layer containing a thermoplastic elastomer composition produced by dynamically heating (A) an ethylene-?-olefin copolymer rubber, (B) a propylene resin, (C) a mineral oil, (D) a cross-linking agent, and (E) an ethylene resin; and a process for producing a laminated product comprising the steps of (1) dynamically heating the above components (A) to (E), and (2) laminating the above layers (i) and (ii).
    Type: Application
    Filed: July 12, 2005
    Publication date: April 6, 2006
    Inventors: Nobuhiro Natsuyama, Hironobu Shigematsu
  • Weather strip
    Patent number: 6499256
    Abstract: A weather strip comprises an extruded part and a molded part which is connected to the extruded part. The molded part is molded from a material containing a solid particle antifriction material and has 1 to 50 &mgr;m of ten points average surface roughness (Rz) on the surface of the molded part. The material is a thermoplastic elastomer or a soft resin.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: December 31, 2002
    Assignees: Toyoda Gosei Co., Ltd., Sumitomo Chemical Co., Limited
    Inventors: Masanori Aritake, Hironobu Shigematsu, Nobuhiro Natsuyama
  • Thermoplastic elastomer composition for calender-molding and sheets prepared therefrom
    Patent number: 6441093
    Abstract: A thermoplastic elastomer composition for calender-molding obtained by dynamically heat-treating a mixture comprising 40 to 95% by weight of (A) an oil-extended olefin copolymer rubber containing 100 parts by weight of an olefin copolymer rubber having a Mooney viscosity (ML1+4100° C.) of 120 to 350 and 20 to 150 parts by weight of mineral oil softening agent and 60 to 5% by weight of (B) a polypropylene resin, a process for producing a calendered sheet from the composition and a sheet obtained by the process.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: August 27, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeshi Tominaga, Nobuhiro Natsuyama, Hironobu Shigematsu, Tatsuo Hamanaka, Makoto Makino
  • Thermoplastic elastomer composition for calender-molding and sheets prepared therefrom
    Publication number: 20010018475
    Abstract: A thermoplastic elastomer composition for calender-molding obtained by dynamically heat-treating a mixture comprising 40 to 95% by weight of (A) an oil-extended olefin copolymer rubber containing 100 parts by weight of an olefin copolymer rubber having a Mooney viscosity (ML1+4100° C.) of 120 to 350 and 20 to 150 parts by weight of mineral oil softening agent and 60 to 5% by weight of (B) a polypropylene resin, a process for producing a calendered sheet from the composition and a sheet obtained by the process.
    Type: Application
    Filed: February 1, 2001
    Publication date: August 30, 2001
    Inventors: Takeshi Tominaga, Nobuhiro Natsuyama, Hironobu Shigematsu, Tatsuo Hamanaka, Makoto Makino
  • Process for producing graft polymer
    Patent number: 5459199
    Abstract: A graft polymer wherein an iodine-containing fluororubber has been grafted on an ethylene-.alpha.-olefin copolymer or other polymer can be obtained by mixing 30 parts by weight of an iodine-containing fluororubber (a vinylidene fluoride-hexafluoropropylene copolymer containing iodine) and 70 parts by weight of an ethylene-propylene copolymer rubber at 180.degree. C. for 30 minutes while applying shear deformation using a Brabender mixer.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: October 17, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Keisaku Yamamoto, Yoshio Tanimoto, Kiyosi Ikeda, Nobuhiro Natsuyama
  • Process for producing graft polymer
    Patent number: 5274042
    Abstract: A graft polymer wherein an iodine-containing fluororubber has been grafted on an ethylene-.alpha.-olefin copolymer can be obtained by mixing 30 parts by weight of an iodine-containing fluororubber (a vinylidene fluoride-hexafluoropropylene copolymer containing iodine) and 70 parts by weight of an ethylene-propylene copolymer rubber at 180.degree. C. for 30 minutes while applying shear deformation using a Brabender mixer.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: December 28, 1993
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Keisaku Yamamoto, Yoshio Tanimoto, Kiyosi Ikeda, Nobuhiro Natsuyama
  • Rubber composition
    Patent number: 5100964
    Abstract: A rubber composition is disclosed, comprising (a) 100 parts by weight of a synthetic rubber and (b) from 0.5 to 10 parts by weight of an alkylene oxide adduct of a saponified ethylene-saturated carboxylic acid vinyl ester copolymer. The rubbber composition can provide a vulcanized rubber composition which can retain its excellent appearance over a prolonged period of time because of freedom from blooming, has excellent antistatic performance due to its electrical conductivity, can be colored in various tints including white, and also has excellent properties in terms of tensile strength and specific gravity.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: March 31, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Keisaku Yamamoto, Yoshio Tanimoto, Kiyoshi Ikeda, Nobuhiro Natsuyama, Sumio Hara, Junichi Koshiba