Patents by Inventor Koki MURASAWA

Koki MURASAWA 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).

  • Diamond smoothing method
    Patent number: 11986905
    Abstract: A diamond smoothing method of irradiating a laser light onto a raised and recessed surface of a diamond, so as to smooth the raised and recessed surface, by ablation that is caused to occur in the diamond by irradiation of the laser light onto the raised and recessed surface. The method includes: a threshold-energy-density detecting step of irradiating the laser light onto the raised and recessed surface, and changing an irradiation energy density of the laser light, so as to detect a threshold energy density as a lower threshold value of the irradiation energy density that causes the ablation to occur; and a smoothing processing step of executing a smoothing processing by irradiating the laser light onto the raised and recessed surface with a smoothing irradiation energy density that is set to be within a range from 1 to 15 times as large as the threshold energy density.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: May 21, 2024
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, KYUSHU INSTITUTE OF TECHNOLOGY, OSG CORPORATION
    Inventors: Hiroshi Ikenoue, Tsuyoshi Yoshitake, Yuki Katamune, Koki Murasawa
  • DIAMOND SMOOTHING METHOD
    Publication number: 20210299787
    Abstract: A diamond smoothing method of irradiating a laser light onto a raised and recessed surface of a diamond, so as to smooth the raised and recessed surface, by ablation that is caused to occur in the diamond by irradiation of the laser light onto the raised and recessed surface. The method includes: a threshold-energy-density detecting step of irradiating the laser light onto the raised and recessed surface, and changing an irradiation energy density of the laser light, so as to detect a threshold energy density as a lower threshold value of the irradiation energy density that causes the ablation to occur; and a smoothing processing step of executing a smoothing processing by irradiating the laser light onto the raised and recessed surface with a smoothing irradiation energy density that is set to be within a range from 1 to 15 times as large as the threshold energy density.
    Type: Application
    Filed: August 1, 2018
    Publication date: September 30, 2021
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, KYUSHU INSTITUTE OF TECHNOLOGY, OSG CORPORATION
    Inventors: Hiroshi IKENOUE, Tsuyoshi YOSHITAKE, Yuki KATAMUNE, Koki MURASAWA