Patent ID: 6045757
Filing Date: 2000-04-04
Classification: B01L,G01N

Abstract:
A membrane filter pipette tip comprising:a hollow tube having a relatively large open upper end for seating on a lower end of a pipette tip mounting shaft of a pipette device and a relatively small open lower end for passing fluid into the lower end of the tube upon operation of the pipette device, and an open channel between the upper and lower ends of the tube;a porous membrane within the open channel; andsupport structure comprising a porous plug extending across the channel within the tube and including an upper surface facing the open end of the tube, a lower surface facing the open lower end of the tube and a sidewall engaging an inner surface of the tube and supporting the porous membrane to extend over the lower surface of the plug across the open channel with a marginal edge of the porous membrane secured against an inner surface of the tube by a marginal edge portion of the membrane surrounding a lower portion of an outer sidewall of the plug and being captured between the outer sidewall of the plug and the inner sidewall of the tube.