Patent ID: 8343438
Filing Date: 2013-01-01
Classification: B01L,G01N

Abstract:
1. A pipette tip comprising: at least one upper portion which defines a central receiving cavity having a longitudinal axis that includes a sealing surface that faces said longitudinal axis and configured for sealing engagement with a pipetter barrel, wherein said upper portion has an inside bottom edge portion including a bottom face and second surface, said bottom face disposed in a substantially perpendicular relation to said longitudinal axis, and said second surface disposed in a direction substantially parallel to said longitudinal axis of said upper portion, at least one lower portion defining a co-axial pipette tip cavity configured to hold a fluid and which is in communication with said central receiving cavity of said at least one upper portion, wherein said at least one lower portion includes an apex end configured to receive said fluid, wherein said lower portion has an upper edge portion having a top face and an third surface, said top face joined with said bottom face and said third surface joined with said second surface to form a hermetic joint between said upper and said lower portion, wherein the at least one upper portion is made from an elastomeric material and the at least one lower portion is made from a second material that is different from the elastomeric material.