US 11,890,559 B2
Liquid recovery filter
Zhenwu Lin, Pasadena, CA (US); Jacob Andrews, Washington, DC (US); and Hannah C. Hertrick, Ashburn, VA (US)
Assigned to SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Solon, OH (US)
Filed by Saint-Gobain Performance Plastics Corporation, Solon, OH (US)
Filed on Aug. 23, 2020, as Appl. No. 17/000,362.
Application 17/000,362 is a division of application No. 15/864,869, filed on Jan. 8, 2018, granted, now 10,751,652, issued on Aug. 25, 2020.
Application 15/864,869 is a division of application No. 14/521,437, filed on Oct. 22, 2014, granted, now 9,861,916, issued on Jan. 9, 2018.
Application 14/521,437 is a continuation in part of application No. PCT/US2013/037671, filed on Apr. 23, 2013.
Application PCT/US2013/037671 is a continuation in part of application No. 13/460,583, filed on Apr. 30, 2012, granted, now 9,757,666.
Prior Publication US 2020/0384392 A1, Dec. 10, 2020
Int. Cl. B01D 35/16 (2006.01); B01D 36/00 (2006.01); B01D 29/90 (2006.01); B01D 19/00 (2006.01); B01D 29/21 (2006.01); B01D 35/30 (2006.01); B01D 29/52 (2006.01); B01D 29/58 (2006.01)
CPC B01D 35/16 (2013.01) [B01D 19/0031 (2013.01); B01D 29/21 (2013.01); B01D 29/52 (2013.01); B01D 29/58 (2013.01); B01D 29/90 (2013.01); B01D 35/30 (2013.01); B01D 36/001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of purging process liquids from a recovery filter assembly comprising the steps of:
providing a filter housing or shell having a shell wall with an upper end cap and a lower end cap, wherein the upper end cap and the lower end cap are secured to the shell wall, and wherein the combination of the shell wall and the end caps define an internal volume;
providing at least one process filter secured in the shell and occupying a portion of the internal volume, wherein the at least one process filter defines a filter core, and wherein an inner surface of the shell and an upstream designated surface of the process filter defines an upstream volume;
providing an inlet port extending from the housing in fluid communication with the upstream volume;
providing an outlet port extending from the housing in fluid communication with the filter core;
providing a recovery port extending from the housing, wherein the recovery port is in fluid communication with the filter core;
providing a recovery filter in-line with the recovery port, wherein the recovery filter is in fluid communication with the filter core;
infusing a gas into the recovery port and through the recovery filter into the filter core; and,
purging processed fluids retained in the filter core after a fluid processing procedure, wherein the processed fluids are purged out of the outlet port.