Patents by Inventor Issei Ishimaru

Issei Ishimaru 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).

  • Light transmitting plate
    Patent number: 6835440
    Abstract: A light guide plate of the present invention is characterized by being obtained by melt molding a thermoplastic resin having a melt flow rate of at least 50 [g/10 min.] under a load of 2.16 kgf at 280° C. The thermoplastic resin is preferably a thermoplastic resin containing an alicyclic structure, more preferably a norbornene-based polymer.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: December 28, 2004
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yuichiro Konishi, Kazuyuki Obuchi, Tatsuo Miyazaki, Issei Ishimaru
  • Light guide plate with alicyclic resin
    Patent number: 6633722
    Abstract: A light guide plate which is made of a polymeric resin having an alicyclic structure and has recesses for reflection formed on a light reflecting surface, the recesses being so arranged that the density of the recesses increases with the distance from a light source. Each recess is preferably a V-shaped groove each having an angle of 70° to 150° and a depth of 1 &mgr;m to 1000 &mgr;m or a groove which is long and approximately perpendicular to the direction in which light is incident at any position on the light reflection surface.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: October 14, 2003
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Teiji Kohara, Yuichiro Konishi, Junko Maruyama, Koji Minami, Issei Ishimaru