ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,598, issued on Jan. 13, was assigned to UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE (Silver Spring, Md.).

"Ozone photometer" was invented by Ru-Shan Gao (Boulder, Colo.) and Steven Ciciora (Superior, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the present invention relate to an apparatus for detecting ozone in ambient air, including an absorption cell with a bounded chamber for receiving air sample for analysis, a light source positioned to transmit light through absorption cell, a detector positioned to measure the attenuation of light passing through absorption cell, a pumping system for transporti...