US 11,896,921 B2
Nonwoven sliver-based filter medium for filtering particulate matter
Kirk S. Morris, Waukegan, IL (US)
Filed by Kirk S. Morris, Waukegan, IL (US)
Filed on Mar. 25, 2022, as Appl. No. 17/704,174.
Application 17/704,174 is a division of application No. 16/939,256, filed on Jul. 27, 2020, abandoned.
Application 16/939,256 is a continuation of application No. 15/941,719, filed on Mar. 30, 2018, granted, now 10,722,829, issued on Jul. 28, 2020.
Application 15/941,719 is a continuation of application No. 14/986,411, filed on Dec. 31, 2015, abandoned.
Claims priority of provisional application 62/173,108, filed on Jun. 9, 2015.
Claims priority of provisional application 62/106,991, filed on Jan. 23, 2015.
Prior Publication US 2022/0212131 A1, Jul. 7, 2022
Int. Cl. B01D 39/16 (2006.01); D04H 1/541 (2012.01)
CPC B01D 39/1623 (2013.01) [D04H 1/5418 (2020.05); B01D 2239/02 (2013.01); B01D 2239/064 (2013.01); B01D 2239/065 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0636 (2013.01); B01D 2239/0695 (2013.01); B01D 2239/1233 (2013.01); B01D 2239/1291 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A filter medium for filtering particulate matter from a liquid, the filter medium comprising:
a nonwoven sliver formed into a predetermined shape, wherein the nonwoven sliver comprises:
first synthetic staple fibers having a first denier;
second synthetic staple fibers having a second denier; and
third synthetic staple fibers having a third denier;
wherein the filter medium has a substantially cylindrical or spherical shape and comprises a core and an outer wrap, a density of the core being greater than a density of the outer wrap,
wherein the filter medium is configured to filter particulate matter from a liquid, with a fiber migration of about 100 fibers or less for a flush volume of about 19,000 milliliters at a flow rate of about 600 cubic centimeters per minute;
wherein:
the nonwoven sliver is a first nonwoven sliver comprising synthetic staple fibers having a first density,
the filter medium further comprises a second nonwoven sliver comprising synthetic staple fibers having a second density,
the core comprises the first nonwoven sliver, and
the outer wrap comprises the second nonwoven sliver.