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:
Dec. 18, 2007
Filed:
Aug. 21, 2002
Robert C. Brown, Ames, IA (US);
Corey Wistrom, Ames, IA (US);
Jerod L. Smeenk, Ames, IA (US);
Iowa State University Research Foundation, Inc., Ames, IA (US);
Abstract
A method and apparatus for filtering gas () with a moving granular filter bed () involves moving a mass of particulate filter material () downwardly through a filter compartment (); tangentially introducing gas into the compartment () to move in a cyclonic path downwardly around the moving filter material (); diverting the cyclonic path () to a vertical path () to cause the gas to directly interface with the particulate filter material (); thence causing the gas to move upwardly through the filter material () through a screened partition () into a static upper compartment () of a filter compartment for exodus () of the gas which has passed through the particulate filter material ().