Patent · US Active

Filter media for respiratory protection

US10806954B2 · kind B2 · utility

0Cited by

17References

10Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Matthew A. Rankin · Brockville, CA
Jeffrey R. Dahn · Surrey, CA
Xiaowei Ma · Lo Wu, CN

Key dates

Filing date	Aug 4, 2016
Grant date	Oct 20, 2020
Priority date	—
Expiry date	Jun 5, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/16
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A respiratory protection filter includes filtration media. The filtration media includes an iron-doped manganese oxide material having an average pore size (BJH method) in a range from 1 to 4 nm and a surface area (BET) of at least 300 m2/g, or at least 350 m2/g, or at least 400 m2/g.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.