Patents by Inventor Shinji NIKAWA

Shinji NIKAWA 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).

  • Short-arc discharge lamp
    Patent number: 11309176
    Abstract: A short-arc discharge lamp may include an arc tube section; at least one side tube section connected to at least one end of the arc tube section; at least one electrode provided inside the arc tube section; and at least one lead rod which is provided inside the at least one side tube section and which is connected to the at least one electrode; wherein the at least one lead rod has at least one metal body disposed so as to be in contact with the at least one lead rod; the at least one side tube section has at least one reduced diameter region; the at least one lead rod is supported by the at least one reduced diameter region via the at least one metal body; and at least one coating film is formed on at least one surface of the at least one metal body.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: April 19, 2022
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventor: Shinji Nikawa
  • High-pressure discharge lamp
    Patent number: 11062896
    Abstract: A high-pressure discharge lamp includes a cathode body composed of a cathode made of tungsten or tungsten alloy and a lead rod inserted in a lead rod insertion hole of the cathode. The cathode has a carbonized layer made of tungsten carbide (W2C) formed on a surface thereof exposed to a discharge space (except for a tip portion thereof) and on an inner surface of the lead rod insertion hole. The carbonized layer contains carbon in an amount of 0.44 g/cc to 0.53 g/cc.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: July 13, 2021
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Masashi Dan, Tomoyoshi Arimoto, Takumi Yamane, Taro Arimoto, Shinji Nikawa
  • HIGH-PRESSURE DISCHARGE LAMP
    Publication number: 20210210336
    Abstract: A high-pressure discharge lamp includes a cathode body composed of a cathode made of tungsten or tungsten alloy and a lead rod inserted in a lead rod insertion hole of the cathode. The cathode has a carbonized layer made of tungsten carbide (W2C) formed on a surface thereof exposed to a discharge space (except for a tip portion thereof) and on an inner surface of the lead rod insertion hole. The carbonized layer contains carbon in an amount of 0.44 g/cc to 0.53 g/cc.
    Type: Application
    Filed: February 7, 2019
    Publication date: July 8, 2021
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventors: Masashi DAN, Tomoyoshi ARIMOTO, Takumi YAMANE, Taro ARIMOTO, Shinji NIKAWA
  • SHORT-ARC DISCHARGE LAMP
    Publication number: 20210159065
    Abstract: A short-arc discharge lamp may include an arc tube section; at least one side tube section connected to at least one end of the arc tube section; at least one electrode provided inside the arc tube section; and at least one lead rod which is provided inside the at least one side tube section and which is connected to the at least one electrode; wherein the at least one lead rod has at least one metal body disposed so as to be in contact with the at least one lead rod; the at least one side tube section has at least one reduced diameter region; the at least one lead rod is supported by the at least one reduced diameter region via the at least one metal body; and at least one coating film is formed on at least one surface of the at least one metal body.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 27, 2021
    Applicant: Ushio Denki Kabushiki Kaisha
    Inventor: Shinji NIKAWA
  • Xenon lamp
    Patent number: D980502
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: March 7, 2023
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventor: Shinji Nikawa