Patent ID: 8216470

Claim:
A filter cartridge comprising: an outer filter that includes a first filter media, the outer filter including a central axis; an inner filter that includes a second filter media, the inner filter is arranged within the central axis of the outer filter, such that there is a space between an inner diameter of the outer filter and an outer diameter of the inner filter, the inner filter having an inner diameter with an opening adapted for inserting a standpipe of a filter housing therein; the outer filter and the inner filter having a first endplate structure on a top end of each of the outer filter and the inner filter; the outer filter and the inner filter having a second endplate structure on a bottom end of each of the outer filter and the inner filter, the second endplate structure having an opening in fluid communication with the space between the outer filter and the inner filter and having an opening in fluid communication with the opening of the inner filter; and at least one of the first endplate structure and the second endplate structure is a heat cured material formed onto the outer filter and the inner filter, such that at least one of the top end and the bottom end of the outer filter and the inner filter are embedded within the heat cured material, wherein the second endplate structure includes an inner sealing surface on an inner diameter of the inner filter, and the inner sealing surface includes an overmolded material.