ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,603, issued on April 15, was assigned to Photothermal Spectroscopy Corp. (Santa Barbara, Calif.).

"Asymmetric interferometric optical photothermal infrared spectroscopy" was invented by Craig Prater (Santa Barbara, Calif.), David Grigg (Santa Barbara, Calif.) and Derek Decker (Carmel, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Asymmetric interferometry is used with various embodiments of Optical Photothermal Infrared (OPTIR) systems to enhance the signal strength indicating the photothermal effect on a sample."

The patent was filed on Aug. 18, 2023, under Application No. 18/452,023.

*For further information, including images, charts and ...