Patent ID: 8172919

Claim:
A window filter apparatus, comprising: a framework having top spaced apart from a bottom, a first side spaced apart from a second side, a center horizontal member connecting the first side to the second side, each of the top, bottom, first side, second side, and center horizontal member further comprising: a planar outer member having a center; a connecting arm having a first end spaced apart from a second end, the first end perpendicularly affixed to the planar outer member center; a pair of identical and opposed inward arms connected to the connecting arm second end, each inward arm angled slightly toward the planar outer member; wherein one inward arm of each of the top, bottom, first side, and second side is configured to be removably positioned within an existing window frame of an existing window, the planar outer member of the top, bottom, first side, and second side positioned against an outer edge of the window frame, an existing air filter positioned between one inward arm and the outer member of the top, the first side, the second side, the air filter further positioned within the planar outer member and one of the inward arms of the center horizontal member, an additional existing air filter positioned between the planar outer member of the bottom, the first side, the second side, the additional air filter further positioned between the planar outer member and one of the inward arms of the center horizontal member.