Pipette means
Patent 4459267 Issued on July 10, 1984. Estimated Expiration Date: 
May 20, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 20, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 06/380257 filed on 05/20/1982US Classes:422/100, Pipette or other volumetric fluid transfer means222/207, Supply container delivering to receiving chamber222/214, Wall deflecting means422/922, Pipettes, i.e., with only one conduit for withdrawing and redistributing liquids [B01L 3/02C]73/864.11, With suction applying and liquid discharge means73/864.12With separate diluent supplyExaminersPrimary: Smith, William F.Attorney, Agent or FirmInternational ClassB01L 3/02 (20060101)Foreign Application Priority Data1979-10-31 GBAbstractPipette means having aspirating and expelling means and a substantially cylindrical tube connected to a pipette tip for fluid flow therebetween; the expelling means being arranged to apply pressure to the outer surface of the cylindrical tube, the diameter and wall thickness of which being chosen so that said tube is compressed elastically and substantially uniformly and circumferentially to reduce the internal volume thereof, tending to expel any liquid from the pipette tip; and the aspirating means being arranged to relieve pressure from the outer surface of said tube, allowing the tube to expand substantially circumferentially and uniformly so that liquid may thereby be drawn into the pipette tip. | |
