Patents by Inventor Yasushi Utagawa

Yasushi Utagawa 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 putting color to glass or erasing color from colored glass
    Publication number: 20050044895
    Abstract: The invention relates to a method for putting color to glass by irradiating a silicate glass, containing a non-bridging oxygen in its structure, with a laser light, thereby forming a non-bridging oxygen hole center therein to put a color to the glass. The invention further relates to a method for putting color to glass by irradiating a silver-ion-containing glass with a high-energy light, thereby forming silver particles in the glass through aggregation of silver ions to put a color to the glass. The invention further relates to a method for erasing color from colored glass by irradiating a colored portion of a glass with a laser light to selectively heat the colored portion by using a laser irradiation apparatus comprising (a) a laser oscillator, (b) a light modulator, (c) a condenser lens mounted on a linear translator, (d) an objective lens, and (e) a galvanometer mirror.
    Type: Application
    Filed: April 15, 2003
    Publication date: March 3, 2005
    Applicants: Central Glass Company, Limited, National Institute of Advanced Industrial Science and Technology, Osaka Seiko Garasu Kabushiki Kaisha
    Inventors: Takashi Yamate, Nobuyuki Itakura, Shinji Nishikawa, Hiroyuki Tamon, Hiroshi Uemura, Kohei Kadono, Tomoko Akai, Masaru Yamashita, Tetsuo Yazawa, Shigeru Mori, Yasushi Utagawa, Jiawei Sheng