Lead scavenger compositions

Claim 1

A FUEL COMPOSITION FOR INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF A STABLE GASOLINE, A MINOR EFFECTIVE ANTI-DETONANT AMOUNT OF AN ORGANO-LEAD ANTI-DETONANT, AND A SCAVENGER MIXTURE FOR SAID ANTI-DETONANT CONSISTING ESSENTIALLY OF A HALOHYDROCARBON SCAVENGER AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROCARBYL-SUBSTITUTED-CYCLOALKYL HYDRIDES, OXIDES AND SULFIDES OF AN ELEMENT OF GROUP V-B OF THE PERIODIC TABLE HAVING AN ATOMIC NUMBER FROM 33 TO 83, INCLUSIVE, WHEREIN SAID GROUP V-B ELEMENT IS ATTACHED TO AN ALICYCLIC RING THROUGH NOT MORE THAN ONE ATOM, SAID ATOM BEING A CHALCOGEN ATOM, EACH CYCLOALKYL GROUP BEARING FROM 1 TO 3 ALIPHATIC HYDROCARBYL SUBSTITUENTS, SAID HALOHYDROCARBON SCAVENGER AND SAID GROUP V-B COMPOUND BEING PRESENT IN AMOUNTS SUCH THAT, WHERE (A) IS THE NUMBER OF MOLS OF SAID HALOHYDROCARBON SCAVENGER PRESENT MULTIPLIED BY ONE-HALF THE NUMBER OF HALOGEN ATOMS PER MOLECULE, FOR EACH GRAM ATOM OF LEAD IN THE LEAD ANTI-DETONANT PRESENT, AND (B) IS THE NUMBER OF THE MOLS OF SAID GROUP V-B COMPOUND PRESENT MULTIPLIED BY THREE-HALVES, FOR EACH GRAM ATOM OF LEAD IN THE LEAD ANTI-DETONANT PRESENT, THE TOTAL OF (A) PLUS (B) IS FROM ABOUT 0.4 TO ABOUT 2.0, (B) IS FROM ABOUT 0.01 TO ABOUT 0.6, AND THE RATIO OF (A) TO (B) IS FROM ABOUT 3:2 TO ABOUT 100:1.