US 11,684,898 B2
Point of use or point of dispense filter with multiple pleat packs
Kalyan Madhavaram, Westborough, MA (US); Bryan Carl Cochran, Lakeville, MN (US); John Paul Puglia, Townsend, MA (US); J. Karl Niermeyer, Tyngsborough, MA (US); Krishna Kamath, Billerica, MA (US); Christopher Paul Barck, Westford, MA (US); and Yoshikimi Douglas Hisano, Malden, MA (US)
Assigned to ENTEGRIS, INC., Billerica, MA (US)
Appl. No. 15/517,638
Filed by ENTEGRIS, INC., Billerica, MA (US)
PCT Filed Sep. 24, 2015, PCT No. PCT/US2015/051981
§ 371(c)(1), (2) Date Apr. 7, 2017,
PCT Pub. No. WO2016/057234, PCT Pub. Date Apr. 14, 2016.
Claims priority of provisional application 62/062,690, filed on Oct. 10, 2014.
Prior Publication US 2017/0259216 A1, Sep. 14, 2017
Int. Cl. B01D 46/00 (2022.01); B01D 71/68 (2006.01); B01D 46/52 (2006.01); B01D 29/07 (2006.01); B01D 29/52 (2006.01); B01D 29/56 (2006.01); B01D 35/30 (2006.01); B01D 63/14 (2006.01); B01D 46/12 (2022.01); B01D 46/58 (2022.01); B01D 46/62 (2022.01); B01D 19/00 (2006.01); B01D 46/42 (2006.01); B01D 46/54 (2006.01); B01D 63/00 (2006.01); B01D 71/26 (2006.01); B01D 71/34 (2006.01); B01D 71/36 (2006.01); B01D 71/56 (2006.01); H01L 21/67 (2006.01)
CPC B01D 71/68 (2013.01) [B01D 19/0031 (2013.01); B01D 29/07 (2013.01); B01D 29/52 (2013.01); B01D 29/56 (2013.01); B01D 35/30 (2013.01); B01D 35/308 (2013.01); B01D 46/12 (2013.01); B01D 46/42 (2013.01); B01D 46/521 (2013.01); B01D 46/543 (2013.01); B01D 46/58 (2022.01); B01D 46/62 (2022.01); B01D 63/00 (2013.01); B01D 63/14 (2013.01); B01D 71/26 (2013.01); B01D 71/34 (2013.01); B01D 71/36 (2013.01); B01D 71/56 (2013.01); H01L 21/67023 (2013.01); B01D 2265/06 (2013.01); B01D 2319/02 (2013.01); B01D 2319/04 (2013.01); B01D 2325/20 (2013.01); B01D 2325/42 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A filter, comprising:
a body having a plurality of cavities, the body having a non-cylindrical shape defined by side walls;
a plurality of subassemblies, each subassembly of the plurality of subassemblies structured and dimensioned to fit inside a cavity of the plurality of cavities, each subassembly of the plurality of subassemblies having:
a plurality of pleat covers defining a first side channel, a first region, a center channel, a second region, and a second side channel in the cavity, each pleat cover of the plurality of pleat covers having openings, wherein the first region is located between the first side channel and the center channel and wherein the second region is located between the center channel and the second side channel; and
a plurality of pleat packs comprising a first pleat pack positioned in the first region and a second pleat pack positioned in the second region, wherein
the first pleat pack comprises a first pleated porous polymeric membrane having a particle size retention rating of 20 nanometers or less,
the second pleat pack comprises a second pleated porous polymeric membrane having a particle size retention rating of 20 nanometers or less, and
the first pleated porous polymeric membrane and the second pleated porous polymeric membrane are cast or extruded membranes made of polymeric materials selected from polyolefins; halogenated polyolefins, perfluorinated polymers, polysulfones, polyamides, and polyesters; and
a first end cap bonded to the body at a first end of the body and a second end cap bonded to the body at a second end of the body, wherein the first side channel, the center channel, and the second side channel extend along a length of the body between the first end and the second end of the body, wherein the body, first end cap and second end cap are made of polymeric materials selected from polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), perfluoroalkoxy polymer (PFA)), polyvinylidene fluoride (PVDF), polyimide, polyetherimide, polycarbonate, polypropylene (PE), polyethylene (PE), or polyether ether ketone (PEEK) and wherein the first end cap has a first opening connected to an inlet port configured to receive a liquid and a first fluid flow passage defined in the first end cap structured for directing the liquid from the inlet port, and the second end cap has a second opening connected to an outlet port and a second fluid flow passage in the second end cap structured for directing the liquid to the outlet port, the inlet port and the outlet port further comprising fittings connectable to components of a system that delivers fluid to and from the filter.