Patents by Inventor Ryunosuke Kuroda

Ryunosuke Kuroda 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).

  • SEMICONDUCTOR LASER
    Publication number: 20220360044
    Abstract: A semiconductor laser including: an optical resonator that has a first compound semiconductor layer containing an n-type impurity, a second compound semiconductor layer containing a p-type impurity, and a light-emitting layer provided between the first compound semiconductor layer and the second compound semiconductor layer; and a pulse injection means that injects excitation energy for a sub-nanosecond duration into the optical resonator, wherein the optical resonator has a multi-section structure separated into at least one gain region and at least one absorption region, and the semiconductor laser generates optical pulses having a pulse width shorter than 2.5 times the photon lifetime in the optical resonator.
    Type: Application
    Filed: August 21, 2020
    Publication date: November 10, 2022
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takahiro NAKAMURA, Ryunosuke KURODA, Hidefumi AKIYAMA, Changsu KIM, Takashi ITO, Hidekazu NAKAMAE
  • SEMICONDUCTOR LASER
    Publication number: 20220360049
    Abstract: A semiconductor laser including: an optical resonator that has a first compound semiconductor layer containing an n-type impurity, a second compound semiconductor layer containing a p-type impurity, and a light-emitting layer provided between the first compound semiconductor layer and the second compound semiconductor layer; and a pulse injection means that injects excitation energy for a sub-nanosecond duration into the optical resonator, wherein the light-emitting layer has an at least five-period multiple quantum well structure, and the semiconductor laser generates optical pulses having a pulse width shorter than 2.5 times the photon lifetime in the optical resonator.
    Type: Application
    Filed: August 21, 2020
    Publication date: November 10, 2022
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Takahiro NAKAMURA, Ryunosuke KURODA, Hidefumi AKIYAMA, Changsu KIM, Takashi ITO, Hidekazu NAKAMAE
  • Method of producing zirconia fused cast refractories
    Patent number: 5976445
    Abstract: A method for producing zirconia fused cast refractories, which comprises casting zirconia fused cast refractories containing at least 33 wt % of a ZrO.sub.2 component utilizing a mold, wherein the mold is rotated on a rotation axis, so that at least a portion of a meltage of raw material poured into the mold, is cooled to solidify under a centrifugal force of at least 1.2 G.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: November 2, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ryunosuke Kuroda, Kazuyori Takatsuji
  • Method of producing zirconia fused cast refractories
    Patent number: 5776397
    Abstract: A method for producing zirconia fused cast refractories, which comprises casting zirconia fused cast refractories containing at least 33 wt % of a ZrO.sub.2 component utilizing a mold, wherein the mold is rotated on a rotation axis, so that at least a portion of a meltage of raw material poured into the mold, is cooled to solidify under a centrifugal force of at least 1.2 G.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: July 7, 1998
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ryunosuke Kuroda, Kazuyori Takatsuji