Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John H. Selverian0
Date of Patent
November 18, 2008
0Patent Application Number
109060110
Date Filed
January 31, 2005
0Patent Primary Examiner
Patent abstract
A tungsten alloy feedthrough for ceramic discharge vessels is used to form a hermetic seal with the ceramic body of the discharge vessel. The tungsten alloy comprises tungsten alloyed with a metal selected from titanium, vanadium or a combination thereof. The alloy may be formulated to have a coefficient of thermal expansion that closely matches that of the ceramic to prevent cracking. Preferably, the tungsten alloy contains from about 10 to about 35 wt. % of a metal selected from Ti, V, or a combination thereof.
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