Patent ID: 7182863

Claim:
A filter, comprising: a housing defining an inlet fluid opening and an outlet fluid opening, said inlet fluid opening and said outlet fluid opening defining a fluid path through said filter; a filter element disposed inside the filter housing, said filter element being disposed in said flow path such that fluid flowing through said flow path must pass through said filter; a center tube located within an interior area defined by the filter element; a dispersement device disposed within said center tube, said dispersement device comprising a first area and a second area, said first area being disposed proximate to said outlet fluid opening and a dividing wall extending completely across the dispersement device, the dividing wall separating the first area and the second area from each other; and an additive composition disposed within said second area of said dispersement device, wherein fluid communication to said additive composition is facilitated through a plurality of openings in portions of said dispersement device defining said second area, the portions of the dispersement device defining the second area depending away from the dividing wall.