US 12,434,180 B2
Nonwoven filtration media including microfibrillated cellulose fibers
Janelle M. Hampton, Burnsville, MN (US); Derek Owen Jones, Andover, MN (US); and Suresh Laxman Shenoy, Bloomington, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Oct. 12, 2023, as Appl. No. 18/379,478.
Application 18/379,478 is a continuation of application No. 17/132,146, filed on Dec. 23, 2020, granted, now 11,819,788.
Application 17/132,146 is a continuation of application No. 16/541,911, filed on Aug. 15, 2019, granted, now 10,905,990, issued on Feb. 2, 2021.
Application 16/541,911 is a continuation of application No. 14/773,977, granted, now 10,421,033, issued on Sep. 24, 2019, previously published as PCT/US2014/020710, filed on Mar. 5, 2014.
Claims priority of provisional application 61/775,536, filed on Mar. 9, 2013.
Prior Publication US 2024/0109011 A1, Apr. 4, 2024
Int. Cl. B01D 39/16 (2006.01); B01D 39/18 (2006.01); B01D 39/20 (2006.01); D04H 1/425 (2012.01); D04H 1/4382 (2012.01)
CPC B01D 39/1607 (2013.01) [B01D 39/1615 (2013.01); B01D 39/1623 (2013.01); B01D 39/18 (2013.01); B01D 39/2017 (2013.01); D04H 1/425 (2013.01); D04H 1/43828 (2020.05); D04H 1/43835 (2020.05); D04H 1/43838 (2020.05); B01D 2239/064 (2013.01); B01D 2239/1233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A nonwoven filtration medium comprising:
a fibrous base media comprising polyester fibers and bicomponent fibers; and
a layer comprising microfibrillated cellulose fibers disposed on a surface of the fibrous base media, wherein a majority of the microfibrillated cellulose fibers have a lateral dimension of up to 4 microns.