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:
Jun. 01, 2021
Filed:
Mar. 15, 2017
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventor:
David M. Castiglione, Hudson, WI (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A62B 18/10 (2006.01); A62B 27/00 (2006.01);
U.S. Cl.
CPC ...
A62B 18/10 (2013.01); A62B 27/00 (2013.01);
Abstract
The present disclosure provides a respiratory protection device that includes a valve assembly operable between an open configuration and a closed configuration. In some exemplary embodiments, the respiratory protection device includes a mask body having a first air chamber, a second air chamber, and a breathable air zone. A valve assembly is operable to a closed configuration to prevent airflow from the first and second air chambers into the breathable air zone.