Filter Base

FIG. 1 is a top, front left perspective view of a first embodiment of a filter base shown according to the present design;

FIG. 2 is a bottom, back left perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is rear end view thereof;

FIG. 8 is a front end view thereof;

FIG. 9 is a top, front left perspective view of a first embodiment of a filter base shown according to the present design;

FIG. 10 is a bottom, back left perspective view thereof;

FIG. 11 is a left side elevational view thereof;

FIG. 12 is a right side elevational thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a rear end view thereof; and,

FIG. 16 is a front end view thereof.

The broken line representations in the figures show unclaimed environment or boundaries.

The broken line representations thus form no part of the claimed design as filed.