Patents by Inventor Kiyohiro Saitou

Kiyohiro Saitou 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 for producing plastic lens
    Patent number: 9481137
    Abstract: Provided is a method for producing a plastic lens, wherein, in molding a plurality of plastic lenses having different optical surface shapes simultaneously in a single mold 50, by designing cavities 3a and 3b such that each of the plastic lenses to be molded has the same volume, a plurality of plastic lenses having different optical surface shapes can be molded simultaneously in a single molding die without impairing the molding accuracy, and an injection compression molding apparatus used for such method.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: November 1, 2016
    Assignee: HOYA CORPORATION
    Inventors: Kiyohiro Saitou, Hayato Kitabayashi
  • METHOD FOR PRODUCING PLASTIC LENS AND INJECTION COMPRESSION MOLDING APPARATUS
    Publication number: 20120217664
    Abstract: Provided is a method for producing a plastic lens, wherein, in molding a plurality of plastic lenses having different optical surface shapes simultaneously in a single mold 50, by designing cavities 3a and 3b such that each of the plastic lenses to be molded has the same volume, a plurality of plastic lenses having different optical surface shapes can be molded simultaneously in a single molding die without impairing the molding accuracy, and an injection compression molding apparatus used for such method.
    Type: Application
    Filed: October 25, 2010
    Publication date: August 30, 2012
    Applicant: HOYA CORPORATION
    Inventors: Kiyohiro Saitou, Hayato Kitabayashi