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. 24, 2024
Filed:
Dec. 09, 2020
3m Innovative Properties Company, St. Paul, MN (US);
Brian D. Gale, Blaine, MN (US);
Andrew R. Fox, Oakdale, MN (US);
Alonso M. Hernandez, Minneapolis, MN (US);
Gregory G. Jager, Oakdale, MN (US);
Abby R. Lemon, Vadnais Heights, MN (US);
Nicolas W. Tremain, Roseville, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A powered room air purifier with a visual indicator of air quality, the visual indicator including: a reflector that defines a forwardly-open-ended reflecting cavity and that includes at least one through-opening in a floor or ceiling of the reflector; at least one diffuser layer that covers the forward opening of the forward-open-ended reflecting cavity; and, at least one LED light source that is positioned within the at least one through-opening, the LED light source and the reflector being configured so that the LED light source is shielded from line-of-sight view along a forward-rearward axis of the powered room air purifier.