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:
Jan. 14, 2025
Filed:
Apr. 13, 2020
3m Innovative Properties Company, St. Paul, MN (US);
Michelle M. Mok, St. Paul, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Nicole D. Petkovich, Little Canada, MN (US);
Jonathan H. Alexander, Roseville, MN (US);
Michael S. Wendland, North St. Paul, MN (US);
Seungkyu Lee, Cupertino, CA (US);
Hassan Sahouani, Hastings, MN (US);
3M Innovative Properties Compnay, St. Paul, MN (US);
Abstract
Provided are acoustic articles, and related methods, that include a porous layer and heterogeneous filler received in the porous layer. The heterogeneous filler can include clay, diatomaceous earth, graphite, glass bubbles, polymeric filler, non-layered silicate, plant-based filler, or a combination thereof, and can have a median particle size of from 1 micrometer to 1000 micrometers and a specific surface area of from 0.1 m/g to 800 m/g. The acoustic article can have an overall flow resistance of from 100 MKS Rayls to 8000 MKS Rayls. The acoustic articles can serve as acoustic absorbers, vibration dampers, and/or acoustic and thermal insulators.