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:
Jun. 15, 2004
Filed:
Mar. 25, 2003
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A lighting system includes a fluorescent lamp and a main body for attaching the fluorescent lamp thereto. The main body is provided with a socket assembly for the attachment of the fluorescent lamp , and an electronic ballast for operating the fluorescent lamp at dimmed levels (as well as at the full light level). The fluorescent lamp is composed of a discharge tube formed of four U-shaped glass tubes that are connected together to form a square in plan view. Each glass tube has an inner diameter of 13.5 mm, and the discharge tube is filled with a rare gas containing neon and argon (at 50:50 ratio by volume). When operating the fluorescent lamp at the full light level, the electronic ballast applies the nominal lamp current of 0.43 A.