US Patent Issued to 3M Innovative Properties on July 28 for "Annular unframed pleated air filter" (Minnesota Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,401, issued on July 28, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Annular unframed pleated air filter" was invented by Luke W. Brubaker (Savage, Minn.), Jeffrey A. Chambers (Minneapolis), Andrew R. Fox (Oakdale, Minn.), Eric J. Madson (Bloomington, Minn.), Emily K. Maher (Hugo, Minn.) and Satinder K. Nayar (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A disposable, annular, unframed, pleated air filter that is in a compacted shape and is openable to a generally cylindrical, ready-for-use shape. The air filter comprises a length of pleated air filter media and at least one adhesive strand, and comprises first ...