There are described a novel removable pipette tip and pipette therefor, which provide separation of substances of a liquid within the tip by centrifuging the tip. The tip comprises a liquid-confining cavity disposed about an axis of symmetry, a dispensing aperture, and separating structure spaced along...http://www.google.de/patents/US4933291?utm_source=gb-gplus-sharePatent US4933291 - Centrifugable pipette tip and pipette therefor
