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:
Jul. 20, 2021
Filed:
Apr. 13, 2018
Applicant:
Ahlstrom-munksjö Oyj, Helsinki, FI;
Inventors:
Anne Viskari, Lempäälä, FI;
Jan Kaukopaasi, Tampere, FI;
Assignee:
Ahlstrom-Munksjö Oyj, Helsinki, FI;
Primary Examiner:
Int. Cl.
CPC ...
B01D 39/16 (2006.01); B01D 35/00 (2006.01); B01D 39/20 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 7/12 (2006.01); B32B 37/02 (2006.01); B32B 37/06 (2006.01); B32B 37/12 (2006.01); B32B 37/18 (2006.01);
U.S. Cl.
CPC ...
B01D 39/163 (2013.01); B01D 35/005 (2013.01); B01D 39/2024 (2013.01); B32B 5/022 (2013.01); B32B 5/26 (2013.01); B32B 7/12 (2013.01); B32B 37/02 (2013.01); B32B 37/06 (2013.01); B32B 37/1207 (2013.01); B32B 37/182 (2013.01); B01D 2239/0216 (2013.01); B01D 2239/064 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0668 (2013.01); B01D 2239/10 (2013.01); B01D 2239/1216 (2013.01); B01D 2239/1233 (2013.01); B32B 2037/1215 (2013.01); B32B 2250/20 (2013.01); B32B 2262/0284 (2013.01); B32B 2262/101 (2013.01); B32B 2305/72 (2013.01); B32B 2307/726 (2013.01); B32B 2315/08 (2013.01); B32B 2367/00 (2013.01);
Abstract
The present invention relates to a filter medium being at least formed of a pre-filter sub-strate laminated with a fine-filter substrate by means of a third binder, wherein the pre-filter substrate comprises synthetic fibers and a first binder, the pre-filter substrate work-ing as a combined surface and depth filter, and the fine-filter substrate comprises at least a second binder and one of synthetic fibers and inorganic fibers.