ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,941, issued on July 14, was assigned to Thermo Scientific Portable Analytical Instruments Inc. (Tewksbury, Mass.).

"Hollow core waveguide flow cell" was invented by Chien-Sheng Liao (Sunnyvale, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A flow cell for use with a spectrometer is described. The flow cell includes a waveguide having a hollow core. An inlet is fluidly coupled at a first end of the hollow core, and an outlet is fluidly coupled at a second end of the hollow core. A window at the inlet is optically coupled to the waveguide at the second end, and a mirror at the outlet is optically coupled to the waveguide at the second end. The...