US Patent Issued to 3M Innovative Properties on Aug. 12 for "Filter cartridge holder with fit-check device" (Canadian Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,773, issued on Aug. 12, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Filter cartridge holder with fit-check device" was invented by Gary E. Dwyer (Mallorytown, Canada) and Pierre Legare (Brockville, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cartridge holder for a respirator, the cartridge holder including a fit-check device with a sealing platen that can be actuated between a first, unsealed position and a second, sealed position in which at least a portion of the sealing platen contacts a major surface of a disposable filter cartridge within the cartridge holder so as to prevent airflow through the disposable filte...