Patents by Inventor Koichiro Natori

Koichiro Natori 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).

  • Powder coating composition for PC strand coating, coating method, and coating film
    Patent number: 9169403
    Abstract: A powder coating composition for PC strand coating which, when used for the coating of a PC strand, can advantageously form a coating film having an even thickness at low cost without causing uneven thickness or stringness is disclosed. The powder coating composition of this invention for PC strand coating is characterized by having a melt viscosity of 3,000-15,000 poise.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: October 27, 2015
    Assignees: NIPPON PAINT CO., LTD., SUMITOMO (SEI) STEEL WIRE CORP.
    Inventors: Tomoyuki Hirai, Yoshitaka Ishihara, Koichiro Natori, Toshihiko Niki, Yoshihiko Touda, Takayuki Yamagiwa
  • POWDER COATING COMPOSITION FOR PC STRAND COATING, COATING METHOD, AND COATING FILM
    Publication number: 20100233478
    Abstract: A powder coating composition for PC strand coating which, when used for the coating of a PC strand, can advantageously form a coating film having an even thickness at low cost without causing uneven thickness or stringness is disclosed. The powder coating composition of this invention for PC strand coating is characterized by having a melt viscosity of 3,000-15,000 poise.
    Type: Application
    Filed: August 22, 2008
    Publication date: September 16, 2010
    Inventors: Tomoyuki Hirai, Yoshitaka Ishihara, Koichiro Natori, Toshihiko Niki, Yoshihiko Touda, Takayuki Yamagiwa
  • Process for production of expanded polytetrafluoroetylene products
    Patent number: 7691299
    Abstract: Disclosed are expanded polytetrafluoroethylene products, such as porous polytetrafluoroethylene tubes, having high axial tear strength and a process for their production. Each expanded polytetrafluoroethylene product has a microstructure, which comprises fibrils and nodes interconnected with each other by the fibrils, and has an axial tear strength of not lower than 6,000 gf/mm as calculated in accordance with the following formula: L/[T×(V/100)] where L (gf) is an axial tear load, T (mm) is a wall thickness, and V (%) is a volume ratio of resin. The process for the production of the expanded polytetrafluoroethylene product includes a high-speed extrusion step.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: April 6, 2010
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Fumihiro Hayashi, Yasuhiro Okuda, Motomi Nakata, Koichiro Natori
  • Stretched polytetrafluoroethylene moldings and process for production thereof
    Publication number: 20050167875
    Abstract: Disclosed are expanded polytetrafluoroethylene products, such as porous polytetrafluoroethylene tubes, having high axial tear strength and a process for their production. Each expanded polytetrafluoroethylene product has a microstructure, which comprises fibrils and nodes interconnected with each other by the fibrils, and has an axial tear strength of not lower than 6,000 gf/mm as calculated in accordance with the following formula: L/[T×(V/100)] where L (gf) is an axial tear load, T (mm) is a wall thickness, and V (%) is a volume ratio of resin. The process for the production of the expanded polytetrafluoroethylene product includes a high-speed extrusion step.
    Type: Application
    Filed: May 1, 2003
    Publication date: August 4, 2005
    Inventors: Fumihiro Hayashi, Yasuhiro Okuda, Motomi Nakata, Koichiro Natori
  • Prosthesis for blood vessel
    Patent number: 6689160
    Abstract: A prosthesis for a blood vessel, which is an expanded porous polytetrafluoroethylene tube having a fine fibrous structure with nodes connected to each other by fibrils. The average fibril length is at least 40 &mgr;m, and the tube has a porosity of at least 70%. The load required for compressing the tube by 10% in its axial direction at a strain rate of 100%/min is at least 10 gf. The resistant force per unit sectional area of the tube produced upon the 10% compression is at least 1.0 gf/mm2.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: February 10, 2004
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuhiro Okuda, Koichiro Natori, Fumihiro Hayashi, Toshihiko Kumada, Toshiya Nishibe, Hidehiko Miura