ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,105, issued on April 21, was assigned to NEXTECH ENVIRONMENTAL LLC (Spring, Texas).
"Floatless pumps and control systems" was invented by Joseph Lee Shannon (Spring, Texas), Lee Thomas Jacobsen (Spring, Texas) and Jeffrey Johnston (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "An improved pump device and control system for removal of liquid, such as viscous leachate, from a bore. A pump device includes a casing with an inlet check valve on a lower portion thereof and a discharge check valve on an upper portion thereof positioned within the casing. A fill cavity within the casing is connectable to a source of pressurized gas. As liquid/visc...