US 12,233,367 B2
Filter media, elements, and methods
Qiong Gao, Minneapolis, MN (US); Richard Patrick DeJong, Eden Prairie, MN (US); Gregory S. Tronnes, Richfield, MN (US); Jason A. Tiffany, Bloomington, MN (US); and Giancarlo M. Izzi, Minneapolis, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Nov. 6, 2023, as Appl. No. 18/502,885.
Application 18/502,885 is a continuation of application No. 17/499,746, filed on Oct. 12, 2021, granted, now 11,845,027.
Application 17/499,746 is a continuation of application No. 16/301,163, granted, now 11,161,070, issued on Nov. 2, 2021, previously published as PCT/US2017/031222, filed on May 5, 2017.
Claims priority of provisional application 62/351,401, filed on Jun. 17, 2016.
Claims priority of provisional application 62/336,433, filed on May 13, 2016.
Prior Publication US 2024/0139662 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 39/16 (2006.01); B01D 39/20 (2006.01)
CPC B01D 39/1623 (2013.01) [B01D 39/2017 (2013.01); B01D 2239/025 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/065 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/0668 (2013.01); B01D 2239/0681 (2013.01); B01D 2239/1233 (2013.01); B01D 2239/1258 (2013.01); B01D 2239/1266 (2013.01); B01D 2239/1275 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gas filter medium comprising:
a surface loading filter layer;
a depth loading filter layer comprising glass fibers and multi-component binder fibers, the depth loading filter layer displaying a DEHS filtration efficiency of at least 55% at 0.4 micron size particles and 2 cm/s and a salt loading capacity of at least 1 g/m2 at 500 Pascals pressure rise over initial; and
a support layer;
wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer,
wherein the gas filter medium has a filter medium has a thickness of 0.25 mm to 1.5 mm.