US Patent Issued to Schlumberger Technology on June 23 for "Quality control of GC makeup gas flow" (French Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,405, issued on June 23, was assigned to Schlumberger Technology Corp. (Sugar Land, Texas).

"Quality control of GC makeup gas flow" was invented by Elena Borisova (Paris), Pierre Beaudy (Chaville, France) and Jean Pierre Bailly (Clamart, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for quality control checking a gas chromatography apparatus at a rig site, the GC apparatus including at least a main column and a makeup flow line in fluid communication with a detector manifold. The GC apparatus measures a first chromatogram of a gas sample with a first makeup gas flow rate and a second chromatogram of the gas sample with a second makeu...