Patents by Inventor Toshihiro Ichizuka

Toshihiro Ichizuka 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).

  • Liquid crystalline polymer film, laminate sheet for optical element using same, and optical element using the laminate
    Patent number: 6051289
    Abstract: To provide a film for optical element made of liquid crystal polymer whose productivity and economical efficiency are improved; a laminated sheet formed by bonding this film to a polarizing plate; and an optical element which can be optically inspected, and used under an environment of high temperature and high moisutre, and whose surface hardness is so high that the surface is not easily damaged. A long laminated sheet for optical element comprising a liquid crystal polymer layer, and a polarizing film layer; and a long laminated sheet for optical element comprising at least a liquid crystal polymer film layer oriented in the direction oblique to the MD direction at a given angle, and a polarizing film layer.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: April 18, 2000
    Assignee: Nippon Petrochemicals, Co., Ltd
    Inventors: Yoshio Tsujimoto, Hiroyasu Ishikawa, Jun Mukai, Teruaki Yamanashi, Toshihiro Ichizuka, Kenji Hosaki