Patents by Inventor Takao Toryu

Takao Toryu 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).

  • Gaseous discharge luminous device
    Patent number: 4000436
    Abstract: A luminous device includes a cell, electrodes having a discharge gap of from 0.1 to 3.0 mm, a phosphor and a gas at a pressure of 30 to 300 nm, the gas having discharge emission spectra below 200 nm. The phosphor is one of various cerium activated yttrium silicates or europium activated orthophosphates and is disposed in the cell for exposure to the emission discharge of the gas. The device gives off blue light with higher emission efficiency and chroma saturation.
    Type: Grant
    Filed: January 30, 1976
    Date of Patent: December 28, 1976
    Assignee: Dai Nippon Toryo Co., Ltd.
    Inventors: Takao Toryu, Akiyasu Kagami, Takashi Hase, Junro Koike, Tetsuo Sakai, Hiroshi Murakami, Iwao Oishi