Patents by Inventor Kengo Hirayama

Kengo Hirayama 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 member, method of manufacturing plastic lens, gasket for molding plastic lens, and jog for casting monomer
    Patent number: 8377345
    Abstract: A method of manufacturing an optical member by mixing isocyanate terminal prepolymer component (A) and aromatic diamine component (B), and immediately after mixing, casting a mixture into a casting mold to obtain a molded article. A method of manufacturing a plastic lens by mixing said components (A) and (B), immediately after mixing, casting a mixture into a casting mold and polymerizing it to obtain a molded article. A gasket for molding plastic lenses comprised of a cylindrical member. A casting mold for molding plastic lenses using this gasket and a monomer casting jig.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: February 19, 2013
    Assignee: Hoya Corporation
    Inventors: Masanori Kadota, Shigeo Nakamura, Kengo Hirayama, Yoshitaka Kitahara, Yuji Hoshi, Yasuhisa Okamoto
  • METHOD OF MANUFACTURING OPTICAL MEMBER, METHOD OF MANUFACTURING PLASTIC LENS, GASKET FOR MOLDING PLASTIC LENS, AND JIG FOR CASTING MONOMER
    Publication number: 20100127411
    Abstract: A method of manufacturing an optical member by mixing isocyanate terminal prepolymer component (A) and aromatic diamine component (B), and immediately after mixing, casting a mixture into a casting mold to obtain a molded article. A method of manufacturing a plastic lens by mixing said components (A) and (B), immediately after mixing, casting a mixture into a casting mold and polymerizing it to obtain a molded article. A gasket for molding plastic lenses comprised of a cylindrical member. A casting mold for molding plastic lenses using this gasket and a monomer casting jig.
    Type: Application
    Filed: January 27, 2010
    Publication date: May 27, 2010
    Applicant: HOYA CORPORATION
    Inventors: Masanori Kadota, Shigeo Nakamura, Kengo Hirayama, Yoshitaka Kitahara, Yuji Hoshi, Yasuhisa Okamoto
  • Process for producing optical member
    Patent number: 7682531
    Abstract: A method of manufacturing an optical member by mixing isocyanate terminal prepolymer component (A) and aromatic diamine component (B), and immediately after mixing, casting a mixture into a casting mold to obtain a molded article. A method of manufacturing a plastic lens by mixing said components (A) and (B), immediately after mixing, casting a mixture into a casting mold and polymerizing it to obtain a molded article. A gasket for molding plastic lenses comprised of a cylindrical member. A casting mold for molding plastic lenses using this gasket and a monomer casting jig.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: March 23, 2010
    Assignee: Hoya Corporation
    Inventors: Masanori Kadota, Shigeo Nakamura, Kengo Hirayama, Yoshitaka Kitahara, Yuji Hoshi, Yasuhisa Okamoto
  • Process for producing optical member, process for producing plastic lens, gasket for plastic lens molding, and jig for monomer injection
    Publication number: 20050200033
    Abstract: A method of manufacturing an optical member by mixing isocyanate terminal prepolymer component (A) and aromatic diamine component (B), and immediately after mixing, casting a mixture into a casting mold to obtain a molded article. A method of manufacturing a plastic lens by mixing said components (A) and (B), immediately after mixing, casting a mixture into a casting mold and polymerizing it to obtain a molded article. A gasket for molding plastic lenses comprised of a cylindrical member. A casting mold for molding plastic lenses using this gasket and a monomer casting jig.
    Type: Application
    Filed: April 8, 2003
    Publication date: September 15, 2005
    Applicant: HOYA CORPORATION
    Inventors: Masanori Kadota, Shigeo Nakamura, Kengo Hirayama, Yoshitaka Kitahara, Yuji Hoshi, Yasuhisa Okamoto