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US 3,985,032 AGranted
Micropipette filter tips
AssigneeCentaur Chemical Co.
InventorSouren Avakian
Life of this patent
Estimating the term…
Abstract
A removable, disposable molded plastic tip for use with a spring-loaded plunger-actuated vacuum pipette. The discharge end of the tip is provided with a solid porous filter member designed to filter a sample fluid during either of fluid entry into, or discharge from, the tip.
Claims10
Filter apparatus for use with a liquid sampling pipette comprising:
- a detachable and disposable tip member in the form of a truncated hollow cone defining an axial passage therethrough;
- an opening defined by the truncated tip of said cone and communicating with said passage to receive the entrance and discharge cycle of liquid sample therethrough;
- and a porous filter positioned at said tip to close said opening during half of said entrance and discharge cycle and displaceable therefrom for the other half of said cycle.
Dependencies are inferred from the claim text.