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:
Feb. 16, 1993
Filed:
Jun. 13, 1990
Takashi Osawa, Kamakura, JP;
Katsuo Murakami, Kamakura, JP;
Seishiro Mitsuhashi, Kamakura, JP;
Yujiro Kamano, Kamakura, JP;
Toshihiko Kobayashi, Kamakura, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A low-pressure rare gas discharge lamp wherein a light emitting gas composed substantially 100% of rare gases is sealed in a bulb and light emitted is from the gas by electric discharge. An isolation film for the light emitting gas from the bulb is provided at least on the inner surface portion of the bulb which portion surrounds a positive column. In another embodiment, a hot cathode type low-pressure rare gas discharging fluorescent lamp includes a glass bulb, a pair of electrodes including an electrode acting as a hot cathode at least in a stable discharging state, the paired electrodes being provided within the glass bulb, a fluorescent substance layer formed on the inner surface of the glass bulb, and a light emitting gas sealed in the interior of the glass bulb. The fluorescent substance layer is rendered luminous by radiation emitted from the light emitting gas. A partial pressure of the sealed, light emitting gas is not higher than 5 Torr, and the light emitting gas includes at least krypton.