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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.:

US 12023610 B1

PDFFull Text
Date of Patent:
Jul. 02, 2024

Filed:

Aug. 22, 2016

Self-cleaning filter

Applicant:

Ahlstrom Oyj, Helsinki, FI;

Inventors:

Jesse Shim, Daegu Metropolitan, KR;

Kevin Kim, Daegu Metropolitan, KR;

Ryan Kwon, Daegu Metropolitan, KR;

Jayden Bae, Daegu Metropolitan, KR;

Patrick Yeo, Chuncheon-si, KR;

Assignee:

Ahlstrom Oyj, Helsinki, FI;

Attorneys:

Sisson & Banyas, Attorneys at Law, LLC

Jeffrey J. Banyas

Primary Examiner:

Jason M Greene

Assistant Examiner:

Eric J McCullough

Int. Cl.
CPC ...
B01D 35/00 (2006.01); B01D 39/16 (2006.01); B01D 39/18 (2006.01); B01D 39/20 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); C10G 31/09 (2006.01); D04H 1/4326 (2012.01); D04H 1/728 (2012.01); D04H 3/009 (2012.01); D04H 3/03 (2012.01);
U.S. Cl.
CPC ...
B01D 35/005 (2013.01); B01D 39/1623 (2013.01); B01D 39/18 (2013.01); B01D 39/2017 (2013.01); B32B 5/022 (2013.01); B32B 5/26 (2013.01); C10G 31/09 (2013.01); D04H 1/4326 (2013.01); D04H 1/728 (2013.01); D04H 3/009 (2013.01); D04H 3/03 (2013.01); B01D 2239/025 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0631 (2013.01); B01D 2239/0636 (2013.01); B01D 2239/064 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/0681 (2013.01); B01D 2239/1216 (2013.01); B01D 2239/1233 (2013.01); B01D 2239/1291 (2013.01); B32B 2250/02 (2013.01); B32B 2250/20 (2013.01); B32B 2262/02 (2013.01); B32B 2262/062 (2013.01); B32B 2262/101 (2013.01); B32B 2262/14 (2013.01); B32B 2307/726 (2013.01); D10B 2331/061 (2013.01); D10B 2505/04 (2013.01);
Abstract

A self-cleaning filtration media for use in hydrocarbon fluid filtration applications has a first layer on an upstream side and a second layer on downstream side of the self-cleaning filtration media. The first layer is composed of polyethersulfone nanofibers having a diameter of 50-1000 nm (0.05-1 micron) and a basis weight of at least 1 gsm. The second layer is a nonwoven substrate suitable for filtration applications. The self-cleaning filtration media exhibits a dust holding capacity of at least 6 mg/cmand a filtration efficiency of greater than 90% for 4 micron particles when the self-cleaning filtration media is tested according to ISO 19438 for fuel filtration and according to ISO 4548-12 for oil filtration. When the second layer includes glass fibers, the self-cleaning filtration media has a dust holding capacity of at least 10 mg/cmand a filtration efficiency of greater than 99% for 4 micron particles when the self-cleaning filtration media is tested according to ISO 19438 for fuel filtration and according to ISO 4548-12 for oil filtration. The self-cleaning filtration media also has a fuel-water separation efficiency of at least 99% when a flat sheet is tested according to ISO 16332; and a lifetime of at least 90 minutes when tested with fuel and oil according to ISO 19438 and ISO 4548-12 using Medium Test Dust and a pressure drop of 70 kPa.

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