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. 05, 2021
Filed:
Aug. 22, 2017
3m Innovative Properties Company, St. Paul, MN (US);
John M. Facer, Langley Park, GB;
Audra A. Wilson, Gateshead, GB;
Christopher P. Henderson, High Shincliffe, GB;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
There is provided a respiratorhaving a harnessand a mask bodythat is air permeable. The mask bodyhas a sinus regionand a primary filtering regionand includes at least one nonwoven fibrous web, which web includes a layer of filter media. The sinus regionof the mask bodyexhibits a resistance to airflow that is greater than the primary filtering region. This resistance to airflow is achieved through an alteration of the intrinsic structure of the plurality of nonwoven fibrous layers in the sinus regionwithout adding additional material to the mask body. The alteration of the intrinsic structure assists in preventing eyewear fogging.