Patents by Inventor Eisuke Nihei

Eisuke Nihei 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).

  • Method of manufacturing optical transmission medium from synthetic resin
    Patent number: 5382448
    Abstract: A method of manufacturing a multimode optical transmission medium from a synthetic resin having the distribution of refractive index varying continuously in a fixed direction. In the method, a monomer is polymerized while a transparent polymer for constituting the wall of a vessel is being dissolved into the monomer. Therefore, this method is free from the defect of methods using conventional polymerization reactions, and has an extremely high productivity.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: January 17, 1995
    Assignees: Yasuhiro Koike, Nippon Petrochemical Co., Ltd.
    Inventors: Yasuhiro Koike, Eisuke Nihei
  • Method of manufacturing a graded optical transmission medium made of synthetic resin
    Patent number: 5253323
    Abstract: A method of manufacturing a multimode optical transmission medium from a synthetic resin having the distribution of refractive index varying continuously in a fixed direction. In the method, the polymerization is caused to proceed utilizing the effect of diffusion or exclusion of a monomer in the gel formed at the polymerization initiating terminal. Therefore, this method is free from the defects of methods using conventional polymerization reactions, and has an extremely high productivity.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: October 12, 1993
    Assignees: Yasuhiro Koike, Nippon Petrochemicals Company, Limited
    Inventors: Yasuhiro Koike, Eisuke Nihei