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:
Jan. 04, 2022
Filed:
Aug. 05, 2016
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Liang Cheng, Shanghai, CN;
Andrew R. Fox, Saint Paul, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 46/00 (2006.01); B01D 46/10 (2006.01);
U.S. Cl.
CPC ...
B01D 46/0086 (2013.01); B01D 46/10 (2013.01); B01D 2275/203 (2013.01);
Abstract
An air filter including a visually uniform filter life indicator (), the air filter () comprising: a conformable, unframed air filter media () that is installable on at least a portion of an upstream face () of a filter-support layer of an air-handling system, wherein the conformable, unframed air filter media comprises at least one passivated area () that provides a visually uniform filter life indicator of the air filter. Filter life indicators are used in order that aspects of the filtration performance of an air filter can be monitored.