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:
Aug. 05, 2014
Filed:
Dec. 28, 2010
Nhat Ha T. Nguyen, Woodbury, MN (US);
John J. Rogers, St. Paul, MN (US);
Nhat Ha T. Nguyen, Woodbury, MN (US);
John J. Rogers, St. Paul, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A filtering face-piece respiratorthat comprises a mask bodyand a harnessthat is joined to the mask body. The mask bodyincludes a filter layerand a nonwoven fibrous cover web. The fibrous cover webis partially occluded and is generally parallel to and spaced from the filter layersuch that air passing through the cover webcan move freely between the cover weband the filter layerso that it can enter the filter layerat essentially any available point over the filter layer surface. The inventive respirator is beneficial in that it can provide very good splash fluid and airborne contaminant protection while also exhibiting an extraordinary low pressure drop across the mask body during breathing.