Patents by Inventor Yoko Sakai

Yoko Sakai 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).

  • Process for producing dyed plastic lens
    Patent number: 8349027
    Abstract: A process which enables a plastic lenses having a refractive index of 1.7 or greater and, in particular, plastic lenses having a refractive index of 1.7 to 1.8 to be dyed uniformly to a great density without unevenness, which is, specifically, a process for producing a dyed plastic lens which comprises conducting following steps (1), (2) and (3) in this order: Step (1): a step comprising coating a substrate at 60° C.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: January 8, 2013
    Assignee: HOYA Corporation
    Inventors: Misa Mishina, Takaaki Kubotera, Shinya Miyajima, Yoko Sakai, Shinichi Yamashita
  • DYED PLASTIC LENS FABRICATION METHOD
    Publication number: 20120015111
    Abstract: Provided is a process for producing a dyed plastic lens in accordance with which in accordance with which deformation and change in the color of the plastic lens can be suppressed and a plastic lens having a refractive index of 1.7 or greater and, in particular, a refractive index of 1.7 to 1.8, can be preferably dyed uniformly to a great density without unevenness.
    Type: Application
    Filed: February 3, 2010
    Publication date: January 19, 2012
    Applicant: HOYA CORPORATION
    Inventors: Misa Mishina, Takaaki Kubotera, Shinya Miyajima, Yoko Sakai, Shinichi Yamashita
  • Process for producing dyed plastic lens
    Publication number: 20110126364
    Abstract: A process which enables a plastic lenses having a refractive index of 1.7 or greater and, in particular, plastic lenses having a refractive index of 1.7 to 1.8 to be dyed uniformly to a great density without unevenness, which is, specifically, a process for producing a dyed plastic lens which comprises conducting following steps (1), (2) and (3) in this order: Step (1): a step comprising coating a substrate at 60° C.
    Type: Application
    Filed: July 30, 2010
    Publication date: June 2, 2011
    Applicant: HOYA CORPORATION
    Inventors: Misa MISHINA, Takaaki KUBOTERA, Shinya MIYAJIMA, Yoko SAKAI, Shinichi YAMASHITA