ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,825, issued on April 22, was assigned to Medtronic CryoCath LP (Toronto).
"Recovery system for N20" was invented by Rachid Mahrouche (LaSalle, Canada), Eric Monger (Beloeil, Canada) and Vladimir Tzonev (Kirkland, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system for the recovery of expanded refrigerant from a cryotreatment system for storage and disposal may generally include first fluid flow path having a first compressor and a fluid recovery reservoir, and a closed-loop second fluid flow path having a thermal exchange device that is in thermal communication with the fluid recovery reservoir, a second compressor, and a condenser. The fi...