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. 08, 2024
Filed:
Jan. 17, 2020
3m Innovative Properties Company, St. Paul, MN (US);
Zhiqun Zhang, North Oaks, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Ignatius A. Kadoma, Cottage Grove, MN (US);
Bryan L. Gerhardt, Woodbury, MN (US);
Liming Song, Woodbury, MN (US);
John D. Stelter, Osceola, WI (US);
Zackary J. Becker, Minneapolis, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present disclosure relates to multi-layer composite articles including at least two nonwoven web layers. Each or the layers may be a spunbonded web, and each may include biodegradable materials. The multi-layered composites of the present disclosure are particularly well suited for air filtration, as they can combine a high dust holding capacity with sufficient strength, dimensional stability, and a relatively low pressure drop.