Patents by Inventor Edward J. Graham

Edward J. Graham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8012766
    Abstract: Aspirating a liquid, includes: providing an aspirating probe comprising probe tip and piston pump, wherein the probe tip and piston pump are in fluid communication; measuring an initial gas pressure in the probe prior to liquid entering the liquid being aspirated; moving the tip into the liquid; moving the piston a distance corresponding to the volume of liquid being aspirated; measuring gas pressure in the volume of gas when the piston stops moving and the liquid pulled into the tip has equilibrated; determining piston volume created by movement of the piston; and determining volume of liquid aspirated by the following formula: Vliquid aspirated=Vpiston volume?((Pinitial?Pfinal)*Volume/unit pressure), wherein Pinitial is initial gas pressure before liquid enters the tip, Pfinal is the final pressure of volume of gas after the liquid has equilibrated, and Volume/unit pressure is the change of gas volume for each change of unit pressure.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: September 6, 2011
    Assignee: Ortho-Clinical Diagnostics, Inc.
    Inventor: Edward J. Graham