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. 17, 2002
Filed:
Jan. 07, 2000
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
An improved cermet for hermetically sealing a discharge vessel in a ceramic discharge lamp where the cermet includes a material having a coefficient of linear expansion which is at least equal to a coefficient of linear expansion of a translucent ceramic, and a material having a coefficient of linear expansion which is smaller than the coefficient of linear expansion of the translucent ceramic, where the cermet has an average coefficient of linear expansion in a range of E±1.0×10 (K ) at a temperature range of 25 to 300° C., where E (K ) is an average coefficient of linear expansion of said translucent ceramic at a temperature range of 25 to 300° C. In addition, a ceramic discharge lamp utilizing such a cermet.