The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2007
Filed:
Dec. 24, 2002
Akira Fujishima, Kawasaki, JP;
Kazuhito Hashimoto, Yokohoma, JP;
Tomokazu Iyoda, Atsugi, JP;
Shigemichi Fukayama, Odawara, JP;
Tetsuo Yoshimoto, Odawara, JP;
Tokuyoshi Saitoh, Ichihara, JP;
Akira Fujishima, Kawasaki, JP;
Kazuhito Hashimoto, Yokohoma, JP;
Tomokazu Iyoda, Atsugi, JP;
Shigemichi Fukayama, Odawara, JP;
Tetsuo Yoshimoto, Odawara, JP;
Tokuyoshi Saitoh, Ichihara, JP;
Kanagawa Academy of Science and Technology, Kanagawa-ken, JP;
Nippon Soda Co., Ltd., Chiyoda-ku, JP;
Abstract
An illuminating device is made from a transparent hollow envelope that encloses a filler gas. The envelope has inner and outer surfaces. The illuminating device has a coating of a fluorescent material deposited on the inner surface of the transparent envelope where the fluorescent material emits light having a visible component and an ultraviolet component; and a titanium dioxide film having first and second opposing surfaces where the first surface of the titanium dioxide film is formed on the outer surface of the transparent envelope. A light transmittance of the titanium dioxide film is at least 50% for light having a wavelength of 550 nm, and the light transmitted from the fluorescent material through the transparent envelope and the first surface of the titanium dioxide film to the second surface thereof causes photocatalytic activity to be generated on the second surface of the titanium dioxide film.