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:
Oct. 15, 2002
Filed:
Jul. 08, 1999
Mitsuru Ikeuchi, Himeji, JP;
Yukiharu Tagawa, Himeji, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A cermet which contains an aluminum oxide component, a silicon dioxide component, a component for modifying the coefficient of linear expansion which is formed of a metal oxide other than aluminum oxide and silicon dioxide, and a metal component with a smaller coefficient of linear expansion than aluminum oxide. A ceramic discharge lamp which has a discharge vessel with an arc tube part and hermetically sealed tube parts, in which furthermore in the arc tube part there are a pair of discharge electrodes opposite one another, and in which a hermetically sealed arrangement is obtained by fritting-welding of hermetically sealing components with the hermetically sealed tube parts, in the hermetically sealed components the base parts of the upholding parts of the electrodes being inserted, on the tips of which the discharge electrodes are located, and in which the hermetically sealing components are formed of the above described cermet.