Patents by Inventor Eisaku Kuroyama

Eisaku Kuroyama 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
    Publication number: 20100239776
    Abstract: The present invention relates to a method of manufacturing a plastic lens comprising a cured film on at least one of a pair of opposing surfaces of a plastic lens substrate. The method of manufacturing a plastic lens of the present invention comprises heating the plastic lens substrate to a temperature greater than or equal to a glass transition temperature of the substrate; coating a photocurable composition on at least one of a pair of opposing surfaces of the lens substrate following the heating; forming a cured film by irradiating the photocurable composition that has been coated on the substrate with light to cure at least a portion of the composition; and conducting a heat treatment of the plastic lens on which the cured film has been formed at a temperature, the temperature being lower than the glass transition temperature of the substrate but greater than or equal to a glass transition temperature of the cured film.
    Type: Application
    Filed: July 18, 2008
    Publication date: September 23, 2010
    Applicant: HOYA CORPORATION
    Inventors: Eiichi Yajima, Kazunori Mikami, Takamitsu Hirose, Takeshi Imizu, Eisaku Kuroyama, Shigeru Takizawa