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:
Feb. 07, 2006
Filed:
Apr. 22, 2004
Kyle A. Brownell, Schofield, WI (US);
Scott W. Mathews, Mosinee, WI (US);
Alan Lorenz Breitenfeldt, Wausau, WI (US);
Emery W. Neitzel, Rothschild, WI (US);
Kyle A. Brownell, Schofield, WI (US);
Scott W. Mathews, Mosinee, WI (US);
Alan Lorenz Breitenfeldt, Wausau, WI (US);
Emery W. Neitzel, Rothschild, WI (US);
Greenheck Fan Corporation, Schofield, WI (US);
Abstract
A two stage air purification system is provided for the removal of airborne impurities from an airflow prior to the airflow entering a building's ductwork. In particular, a primary air filter is mounted within the hood of, for example, a cooking area and operable to receive grease-laden air and remove a portion of the impurities. The air is then sent to a secondary filter, also mounted within the hood, that removes additional impurities. The air is then sent through the building's ductwork and eventually out the building.