US Patent Issued to The United States of America as Represented by the Secretary of the Army on July 28 for "Method to calculate fit factor and protection factor with a dynamically changing background challenge" (Maryland Inventor)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,305, issued on July 28, was assigned to The United States of America as Represented by the Secretary of the Army (Washington).

"Method to calculate fit factor and protection factor with a dynamically changing background challenge" was invented by Steven A Yurechko (Port Deposit, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for quantitatively evaluating the protective efficacy of a respiratory protection mask in an environment with a dynamic pollutant concentration, including providing a first air sampling unit and a second air sampling unit both electronically connected to a data acquisition system, obtaining a first pollutant reading...