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:
Sep. 12, 2017
Filed:
Aug. 19, 2014
3m Innovative Properties Company, St. Paul, MN (US);
Britton G. Billingsley, St. Paul, MN (US);
Larry A. Brey, Woodbury, MN (US);
William Buechter, Fairfax, VA (US);
Pierre Legare, Brockville, CA;
Derek M. Maanum, St. Paul, MN (US);
Gregory W. Peterson, Belcamp, MD (US);
Joseph A. Rossin, Columbus, OH (US);
The United States of America as Represented by the Secretary of the Army, Washington, DC (US);
Abstract
A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate and containing zinc (hydr)oxide. The first or second filter media particles also contain an amine-functional material. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in breakthrough times for nitrogen dioxide, hydrogen sulfide, ammonia and formaldehyde compared to a device containing only the first filter media particles or only the second filter media particles.