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:
Nov. 16, 2004
Filed:
Oct. 16, 2000
Shinobu Furuta, Shiga-ken, JP;
Yoshitaka Kurimoto, Takatsuki, JP;
Kazuhisa Tanaka, Katano, JP;
Tatsuya Taniwaki, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A discharge lamp electrode, a discharge lamp for which the electrode is used, and a method for producing a discharge lamp electrode with increased productivity are disclosed. With the disclosed discharge lamp electrode, deformations in its end portion are suppressed, so that the electrode life is extended. For the discharge lamp electrode tungsten wires are wound around an electrode rod in the same turning direction and form a first-layer coil and a second-layer coil A tungsten wire forming the second-layer coil is wound along a spiral valley between adjacent turns in the first-layer coil