Patents by Inventor Akimasa Endou

Akimasa Endou 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).

  • Photocatalyst, light source and lighting device
    Patent number: 6242752
    Abstract: A translucent cover (9) is so provided as to cover a high pressure sodium lamp (11) adapted to radiate at least visible light and rays of light in the wavelength range of 300 nm to 400 nm. A photocatalytic film (13) which is capable of preventing generation of interference between visible light is formed on either one of or both the inner side and outer side of the translucent cover (9). The photocatalytic film (13) contains as the principal component titania (TiO2) of which the peak wavelength for visible light transmittance is nearly the same as the peak wavelength for visible light radiated from the high pressure sodium lamp (11). Ultraviolet light radiated from the high pressure sodium lamp (11) enhances oxidation and decomposition of substances performed by the photocatalytic film (13), thereby preventing grime and contaminants from adhering to the translucent cover (9).
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: June 5, 2001
    Assignees: Toshiba Lighting and Technology Corp., Nihon Doro Kodan-Japan Highway Public Corp.
    Inventors: Ryuji Soma, Hisashi Honda, Ariyoshi Ishizaki, Tsutomu Watanabe, Hiroshi Kamata, Akiko Saitou, Akimasa Endou