US Patent Issued to 3M Innovative Properties on June 2 for "Respiratory protection device positive pressure seal check methods and devices" (Wisconsin, Florida Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,642,997, issued on June 2, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Respiratory protection device positive pressure seal check methods and devices" was invented by David M. Castiglione (Hudson, Wis.) and Thomas R. Braxton II (Tampa, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a respiratory protection device comprising a mask body defining a breathable air zone for a wearer and having a front cover; an exhale valve in fluid communication with the breathable air zone; and a seal check mechanism disposed in the front cover, where the seal check mechanism comprises a button associated with a flap such that, w...