Patents by Inventor Oguma Reiji

Oguma Reiji 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).

  • Infrared absorbing quartz glass with iron and aluminum
    Patent number: 4500642
    Abstract: Quartz glass includes iron and aluminum. The total iron content ranges from 0.01 to 5% by weight, and the total aluminum content ranges from 0.01 to 10% by weight. The quartz glass exhibits infrared rays-absorbing ability and visible light-transmitting ability. Also a process for making such a quartz glass is disclosed.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: February 19, 1985
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Oguma Reiji, Hirai Akihiro
  • Quartz glass and a process for making same
    Patent number: 4419118
    Abstract: Quartz glass includes iron and aluminum. The total iron content ranges from 0.01 to 5% by weight, and the total aluminum content ranges from 0.01 to 10% by weight. The quartz glass exhibits infrared rays-absorbing ability and visible light-transmitting ability. Also a process for making such a quartz glass is disclosed.
    Type: Grant
    Filed: December 18, 1981
    Date of Patent: December 6, 1983
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Oguma Reiji, Hirai Akihiro