Patent ID: 8192699

Claim:
Filter pipette tip with a small tube with a relatively large aperture at one end for attaching to a pipette, a relatively small aperture at the other end for the passage of liquid and a through-channel between the large aperture and the small aperture and a porous filter arranged in the through-channel filling up a portion of the through-channel and comprising at least a first layer and a second layer arranged in series in the direction of the through-channel of which a fine-pore layer has a pore size of a maximum of approximately 20 μm and has a coarse-pore layer a pore size of approximately 20 to 50 μm, the first and second layers having different pore sizes, wherein the first layer comprises first compressed plastics granulate, the second layer comprises second compressed plastics granulate, and wherein the first and second layers of the filter are sintered to one another to form a one-piece filter body.