Mouth filter for use with pipettes
Patent 4111807 Issued on September 5, 1978. Estimated Expiration Date: 
October 11, 1997. 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.
October 11, 1997. 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 References 2376231 2692503 2879207 InventorsAssigneeApplicationNo. 05/840685 filed on 10/11/1977US Classes:73/864.03, With user mouth protection210/251, COMBINED210/446, Axially aligned inlet and outlet210/450, Gasket within casing or spaced removable end members210/451, Internal fixed shoulder supporting filter element210/453, Filter element clamped between closure and end wall210/462, Pipe is connection to plate422/100, Pipette or other volumetric fluid transfer means422/101, Including means for separating a constituent; e.g., filter, condenser, extractor, etc.422/922Pipettes, i.e., with only one conduit for withdrawing and redistributing liquids [B01L 3/02C]ExaminersPrimary: Sever, FrankAttorney, Agent or FirmInternational ClassesB01D 46/10 (20060101)B01L 3/02 (20060101) A61M 5/38 (20060101) A61M 5/36 (20060101) AbstractIn accordance with the invention there is provided a mouth filter for use with pipettes to insure that none of the liquid or any of the bacteria in the liquid being drawn into the pipette reach the mouth of the technician applying the suction. The filter comprises an organic resin housing having a filter membrane therein which divides the housing into an inlet chamber and an exit chamber, the filter membrane being hydrophobic and constituting a bacteria barrier. The housing has tubular extensions extending from the oppositely disposed axial end walls thereof. A tube is secured to one extension of the housing and is adapted to be secured in communicating relationship with a pipette into which the liquid is to be drawn. Connected to the other housing extension is a mouthpiece for mouth-applied suction by the technician, which suction is communicated through the filter membrane and tube to the pipette.Field of SearchWith flow controller for material being treatedAttached to or within portable prefilt receiver Selective directive flow relative to filter Within flow line or flow line connected close casing Clamped in casing joint Axially aligned inlet and outlet Gasket within casing or spaced removable end members Internal fixed shoulder supporting filter element | |
