ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,930, issued on Nov. 25, was assigned to Halliburton Energy Services Inc. (Houston).
"Multi-column gas chromatography for analysis of a formation sample" was invented by Mathew Dennis Rowe (Houston) and Jhanvi Manishkumar Kevadiya (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of multi-column gas chromatography for analysis of a formation sample are disclosed. In one embodiment, an apparatus comprises a gas chromatography instrument and a controller. The gas chromatography instrument comprises a sample injector; a primary column to separate out a hydrocarbon subset; a secondary column valve coupled to the primary column; a primar...