Catalytic converter

Claim 1

A TWO-STAGE CATALTIC CONVERTER FOR TREATING INTERNAL COMBUSTION ENGINE EXHAUST GASES COMPRISING A CONVERTER BODY, A SINGLE MONOLITHIC CORRUGATED CERAMIC CATALYST CARRIER FORMED WITH A RELATIVELY LARGE NUMBER OF RELATIVELY SMALL INDIVIDUAL PASSAGES EXTENDING LONGITUDINALLY THERETHROUGH, MEANS TO MOUNT SAID CARRIER WITH SAID BODY TO SUBSTANTIALLY FILL THE SPACE WITHIN SAID BODY, A REDUCTION CATALYST COATED ONTO THE WALLS OF A FIRST PORTION OF SAID PASSAGES IN SAID CARRIER TO THEREBY DEFI NE A REDUCTION CATALYST BED IN SAID CARRIER, AN OXIDATION CAALYS COATED ON THE WALLS OF A SECOND PORTION OF SAID PASSAGES IN SAID CARRIER TO THEREBY DEFINE AN OXIDANT CATALYST BED IN SAID CARRIER, SAID FIRST AND SECOND PORTIONS OF SAID PASSAGES BEING SO LOCATED THAT SAID REDUCTION BED IS NESTED WITHIN SAID OXIDATION BED, MEANS TO ADMIT EXHAUST GASES TO BE TREATED INTO SAID CONVERTER BODY AT A FIRST LOCATION THEREIN AND INTO THE ENDS OF THE PASSAGES OF SAID REDUCTION BED IN SAID CARRIER ASSOCIATED WITH SAID FIRST LOCATION, AND MEANS TO ADMIT AIR UNDER PRESSURE INTO SAID CONVERTER BODY AT A SECOND LOCATION THEREIN, AND TO MIX SAID AIR UNDER PRESSURE WITH SAID EXHAUST GASES AFTER SAID EXHAUST GASES HAVE EXCITED FROM THE PASSAGES OF SAID REDUCTION BED AT SAID SECOND LOCATION, AND TO ADMIT THE MIXTURE OF SAID AIR AND THE PARTIALLY TREATED EXHAUST GASES INTO THE ENDS OF THE PASSAGES OF SAID OXIDATION BED IN SAID CARRIER ASSOCIATED WITH SAID SECOND LOCATION.