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. 25, 2007
Filed:
Dec. 05, 2002
Applicants:
Feng Mei, Gent, BE;
Willy Marrecau, Rome, GA (US);
Inventors:
Feng Mei, Gent, BE;
Willy Marrecau, Rome, GA (US);
Assignee:
NV Bekaert SA, Zwevegem, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 39/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A filter medium includes at least a first and a second layer. Both first and second layers have a layer volume VLq and a layer filtering surface SLq, where SLq is the accumulation of all mantle surfaces of the fibers present in this layer q. The first layer has a SL/VL-ratio of less than 32500 m/m, and the second layer has a SL/VL-ratio being more than 1.1×SL/VL