Abstract
By a News Reporter-Staff News Editor at Robotics & Machine Learning Daily News Daily News-According to news reporting originatin g from Washington, D.C., by NewsRx journalists, a patent application by the inve ntor Gjerde, Douglas T. (Saratoga, CA, US), filed on December 19, 2021, was made available online on February 22, 2024. No assignee for this patent application has been made. Reporters obtained the following quote from the background information supplied by the inventors: "Pipettes and robotic liquid handlers move liquids using pipet te tips typically in a back-and-forth flow. Differences in air pressure above th e liquid move the liquid in and out of pipette tips. The movement of liquids in and out of pipette tips relies on positive and negative air pressure in the tip chamber above the liquid that is drawn into the pipette tip. A negative pressure draws liquid into the pipette tip. A release of the negative pressure and even a slight positive pressure dispenses the liquid from the tips into designated lo cations. "Pipette tip chromatography extraction columns use the same principles. Pipette tip columns are pipette tips that have been modified to contain packed chromatog raphy beds located at the distal end of the pipette tip. Liquids enter and exit the column in a back and forth fluid flow entering and exiting through the dista l end of the column. These pipette tip columns can utilize air displacement for aspiration and expulsion to achieve back and forth flow.
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