US Patent Issued to Blueair on Dec. 16 for "Air purifier" (Swedish Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,137, issued on Dec. 16, was assigned to Blueair AB (Stockholm).

"Air purifier" was invented by Lars Henrik Dunberger (Stockholm), Lars Johan Wilhelm Hadding Delin (Stockholm) and Jelena Radic (Stockholm).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for indicating to a user the expected time for an air purifier to achieve a target level of pollution in a room by: (A) acquiring the current level of pollution (CP) in said room; (B) acquiring current air flow speed (CAFS) through said air purifier; (C) comparing the current level of pollution (CP) with a pre-determined target level of pollution (IP); (D) calculating the expected time (T) requi...