Electrically conductive compositions and method of manufacture thereof

Claim 1

A COMPOSITION CONSISTING ESSENTIALLY OF A LEADSELENIUM BASE CONSTITUENT CONSISTING ESSENTIALLY OF FROM 72.45% TO 73.50% BY WEIGHT LEAD, THE BALANCE SUBSTANTIALLY ALL SELENIUM, AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF, IODINE, CHLORINE, BROMINE, ZIRCONIUM, SILICON, TITANIUM, INDIUM, TANTALUM, GALLIUM, ALUMINUM, COPPER, GOLD, BISMUTH, ANTIMONY, FLUORINE, COLUMBIUM, SODIUM, THALLIUM, POTASSIUM, LITHIUM AND ARSENIC, IN AN AMOUNT EFFECTIVE TO MODIFY THE CONDUCTIVITY OF SAID BASE CONSTITUENT NOT IN EXCESS BY WEIGHT PERCENT OF THE LEAD AND SELENIUM OF SAID MEMBERS AS FOLLOWS: 0.50 IODINE; 0.20 CHLORINE; 0.60 BROMINE; 0.60 ZIRCONIUM; 0.50 SILICON; 0.10 TITANIUM; 0.20 INDIUM; 0.60 TANTALUM; 0.15 GALLIUM; 0.03 ALUMINUM; 0.30 COPPER; 0.35 GOLD; 0.02 FLUORINE; 0.35 COLUMBIUM; 0.08 SODIUM; 0.15 POTASSIUM; 0.03 LITHIUM; AND BISMUTH, ANTIMONY, THALLIUM AND ARSENIC NOT IN EXCESS OF FROM 0.40 TO 2.5, FROM 0.20 TO 1.5., FROM 0.72 TO 1.5 AND FROM 0.10 TO 0.30, RESPECTIVELY, OVER THE AFOREMENTIONED RANGE OF LEAD.