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US 12,460,281 B2Granted
Tungsten-containing material and direct current discharge lamp electrode
AssigneeA.L.M.T. Corp.
InventorHidenobu Nishino
Life of this patent
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Abstract
A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
Claims5
A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
Dependencies are inferred from the claim text.