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. 26, 2019
Filed:
Aug. 08, 2016
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventor:
Dean R. Duffy, Woodbury, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A41D 13/11 (2006.01); A62B 18/02 (2006.01); A62B 18/08 (2006.01); A62B 23/02 (2006.01);
U.S. Cl.
CPC ...
A41D 13/1115 (2013.01); A41D 13/1138 (2013.01); A41D 13/1161 (2013.01); A62B 18/02 (2013.01); A62B 18/084 (2013.01); A62B 23/025 (2013.01); Y10T 29/49604 (2015.01);
Abstract
A cup-shaped filtering face-piece respiratorthat includes a harnessand a mask bodythat has a multi-layer filtering structure. The mask bodyincludes at least one dartpermanently bonded in the filtering structure, the darttapering from a center planeof the mask bodyto a side edge of the mask body. The dartinhibits collapse of the cup-shaped form of the respirator