Patents by Inventor Kiyofumi Ookawa

Kiyofumi Ookawa 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).

  • NEUTRON POSITION DETECTOR
    Publication number: 20180329088
    Abstract: According to one embodiment, a neutron position detector includes a gas including a 3He gas and an additive gas. The gas has a gas composition being set so that a total of ranges of a proton and a tritium in the gas is 2.0 to 2.7 mm. The partial pressures are in an extent surrounded by a first gas composition point of the 3He gas of 5 atm and the additive gas of 1.6 atm, a second gas composition point of the 3He gas of 5 atm and the additive gas of 2.3 atm, a third gas composition point of the 3He gas of 20 atm and the additive gas of 0.6 atm, and a fourth gas composition point of the 3He gas of 20 atm and the additive gas of 1.3 atm.
    Type: Application
    Filed: February 26, 2018
    Publication date: November 15, 2018
    Applicant: Toshiba Electron Tubes & Devices, Co., Ltd.
    Inventors: Noriyuki HIKIDA, Kiyofumi OOKAWA, Kazuya ISHIZAWA
  • Neutron position detector
    Patent number: 10126441
    Abstract: According to one embodiment, a neutron position detector includes a gas including a 3He gas and an additive gas. The gas has a gas composition being set so that a total of ranges of a proton and a tritium in the gas is 2.0 to 2.7 mm. The partial pressures are in an extent surrounded by a first gas composition point of the 3He gas of 5 atm and the additive gas of 1.6 atm, a second gas composition point of the 3He gas of 5 atm and the additive gas of 2.3 atm, a third gas composition point of the 3He gas of 20 atm and the additive gas of 0.6 atm, and a fourth gas composition point of the 3He gas of 20 atm and the additive gas of 1.3 atm.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: November 13, 2018
    Assignee: Toshiba Electron Tubes & Devices Co., Ltd.
    Inventors: Noriyuki Hikida, Kiyofumi Ookawa, Kazuya Ishizawa