Patents by Inventor Yasuhiro Nakano

Yasuhiro Nakano 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: 6130288
    Abstract: A copolymer latex with a total solids content of at least 67% by weight, which is characterized by having a viscosity of 2,000 centipoises or less as measured with a BM viscometer under the conditions of total solids content of 67% by weight and at room temperature, is provided. Such a low viscosity and high solids-content copolymer latex is produced through an emulsion polymerization in which the method of use of the emulsifier and the amount thereof are controlled following specific conditions.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: October 10, 2000
    Assignee: Nippon Zeon Co Ltd
    Inventors: Toshihiro Inoue, Yasuhiro Nakano
  • Patent number: 5957398
    Abstract: A pulverizer for pulverizing a product has a container and at least one working part within the container, which may contain a pulverizing medium. At least one of (1) an inner liner of the container, (2) an outer shell of the working part and (3) an outer shell of the pulverizing medium is formed from a composite ceramic material containing aluminum oxide material as a main component, and zirconium oxide material in an amount of 15-40 wt. %. At least one of Y.sub.2 O.sub.3 and CeO.sub.2 is present in the zirconium oxide material in an amount of 0.1-5 mol %. A pulverizer may comprise at least one of a working part of the pulverizer and a container having a Vickers hardness (Hv) of 1300 kgf/mm.sup.2 or higher, and a pulverizing medium whose Vickers hardness (Hv) is 100-600 kgf/mm.sup.2 lower than that of the Vickers hardness of said at least one of the working part and the container member.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: September 28, 1999
    Assignee: Toray Industries, Inc.
    Inventors: Tomohiko Ogata, Minoru Takuwa, Shouichiro Goto, Shin-ichi Itou, Yasuhiro Nakano, Toru Tsurumi
  • Patent number: 5286783
    Abstract: A copolymer latex obtained by emulsion-polymerization of 45 to 85% by weight of a conjugated diene monomer, 0.1 to 25% by weight of an ethylenically unsaturated acid monomer, 10 to 45% by weight of a vinyl-pyridine monomer and 0 to 30% by weight of another monomer copolymerizable with these monomers. The surface of the latex particles contains the carboxy groups in an amount of at least 0.01 milliequivalent per gram of the copolymer. An adhesive composition comprising the copolymer latex is useful for boding fibers, particularly polyester fibers, to rubber with a high adhesion strength.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: February 15, 1994
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hiroshi Hisaki, Katsuo Hagiwara, Yasuhiro Nakano, Satoru Takinami, Masayoshi Sekiya
  • Patent number: 4569963
    Abstract: An adhesive composition for bonding fibers to a rubber is made of an aqueous dispersion composed mainly of a resorcinol/formaldehyde resin and a rubbery vinylpyridine copolymer latex. Particles of the rubbery vinylpyridine copolymer latex having a weight-average particle size of at least 0.15 micron, provided when the weight-average particle size is less than 0.16 micron, the particles having a particle size of at least 0.18 micron amount to at least 5% by weight.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: February 11, 1986
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hiroshi Hisaki, Yasuhiro Nakano, Naohiko Takahashi, Yuichi Inoue