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:
Dec. 11, 1990
Filed:
Sep. 26, 1989
Masahiko Asakura, Yokosuka, JP;
Kimio Shiraiwa, Yokohama, JP;
Yoichi Hattori, Yokosuka, JP;
Naotosi Toume, Yokosuka, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A low-pressure mercury vapor discharge lamp. The lamp includes at least two tube sections substantially parallel to each other for holding a quantity of mercury vapor, sealings for sealing one end of each of two of the tube sections, discharge electrodes for activating the mercury vapor for generating a luminescent discharge, a reduced diameter connecting tube for sealing the remaining ends of the tube sections to one another in successive pairs, and an amalgam for maintaining the mercury vapor pressure at a level which maintains the luminance of the discharge at a substantially constant value.