The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2026
Filed:
Oct. 18, 2021
3m Innovative Properties Company, St. Paul, MN (US);
Nicole D. Petkovich, Little Canada, MN (US);
Michelle M. K. Mok, St. Paul, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Jonathan H. Alexander, Roseville, MN (US);
Samantha D. Smith, Minneapolis, MN (US);
Yongbeom Seo, Woodbury, MN (US);
Daniel E. Johnson, Marine On St. Croix, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Provided herein are acoustic articles () that include a porous layer () and heterogeneous filler () received in the porous layer. The heterogeneous filler is substantially non-porous and present in an amount of from 0.25% to 7% by volume relative to the total volume of the porous layer and has a specific surface area of from 0.01 m/g to 1 m/g. The acoustic article has a flow resistance of from 500 MKS Rayls to 12,000 MKS Rayls.