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:
Mar. 03, 2020
Filed:
Aug. 22, 2017
3m Innovative Properties Company, St. Paul, MN (US);
Seyed A. Angadjivand, Los Angeles, CA (US);
James E. Springett, Webster, WI (US);
John M. Brandner, St. Paul, MN (US);
Marvin E. Jones, Grant, MN (US);
Andrew R. Fox, Oakdale, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
John D. Stelter, Osceola, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A flat-fold respirator is made from a stiff filtration panel joined to the remainder of the respirator through at least one line of demarcation. The panel contains a porous monocomponent monolayer nonwoven web that contains charged intermingled continuous monocomponent polymeric fibers of the same polymeric composition and that has sufficient basis weight or inter-fiber bonding so that the web exhibits a Gurley Stiffness greater than 200 mg and the respirator exhibits less than 20 mm HO pressure drop. The respirator may be formed without requiring additional stiffening layers, bicomponent fibers, or other reinforcement and can be flat-folded for storage. Scrap from the manufacturing process may be recycled to make additional stiff filtration panel web.