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Class Information
Number: 210/275
Name: Liquid purification or separation > Particulate material type separator, e.g., ion exchange or sand bed > With rehabilitation means > Backwash or blowback means
Description: Apparatus including means for passing a fluid through the medium in a direction of flow during separation.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7473356 |
Wastewater treatment system by superconducting magnetic separation |
Jan. 6, 2009 |
| 7470372 |
Fluid treatment device |
Dec. 30, 2008 |
| 7413649 |
Treatment apparatus with modular chemical containing units having one-way valve assemblies |
Aug. 19, 2008 |
| 7344640 |
Urban runoff water treatment methods and systems |
Mar. 18, 2008 |
| 7341662 |
Distribution and collection headers for a filter bed |
Mar. 11, 2008 |
| 7294258 |
Device for chemically/physically treating drinking water |
Nov. 13, 2007 |
| 7258798 |
Potable water treatment plant and method of maintaining same |
Aug. 21, 2007 |
| 7252761 |
Filtration installation for filtering the water of a water pool |
Aug. 7, 2007 |
| 7192521 |
Filter having a media retaining plate |
Mar. 20, 2007 |
| 7163621 |
Fluidizable device |
Jan. 16, 2007 |
| 7157001 |
Carbon filtration process and apparatus for removing PCB's and other compounds from wastewater |
Jan. 2, 2007 |
| 7147782 |
Method and apparatus for metal removal by ion exchange |
Dec. 12, 2006 |
| 7138056 |
Filter underdrain system for backwash flow and method for measuring same |
Nov. 21, 2006 |
| 7090771 |
Filtration system underdrain |
Aug. 15, 2006 |
| 7063787 |
Filter media retaining cap and hold down grid |
Jun. 20, 2006 |
| 7048857 |
Method and apparatus for metal removal ion exchange |
May. 23, 2006 |
| 7045067 |
Method and apparatus for increasing filter contaminant loading capacity |
May. 16, 2006 |
| 7029578 |
Water treatment system |
Apr. 18, 2006 |
| 6991726 |
Filter having a media retaining plate |
Jan. 31, 2006 |
| 6989096 |
Apparatus for directing fluids through a filter system |
Jan. 24, 2006 |
| 6972091 |
Ion exchange resin plant |
Dec. 6, 2005 |
| 6966987 |
Tangentially fed media filter method and apparatus |
Nov. 22, 2005 |
| 6942795 |
Modular filter system and method of repairing and/or replacing components thereof |
Sep. 13, 2005 |
| 6936176 |
Transportable water treatment system |
Aug. 30, 2005 |
| 6921481 |
Automatic backwash filter system |
Jul. 26, 2005 |
| 6843920 |
Ion exchange system using U-tube principle |
Jan. 18, 2005 |
| 6841069 |
High rate filter and high rate filtration method using the filter |
Jan. 11, 2005 |
| 6830684 |
Integrated liquid and gas distribution device for underdrain block laterals |
Dec. 14, 2004 |
| 6821445 |
Rainwater-treating apparatus in combined sewer system and backwashing method therefor |
Nov. 23, 2004 |
| 6821435 |
Water purifying system |
Nov. 23, 2004 |
| 6797166 |
Underdrain apparatus |
Sep. 28, 2004 |
| 6773589 |
Method and apparatus for removing particulate contaminants from commercial laundry waste water |
Aug. 10, 2004 |
| 6740237 |
Low profile extruded underdrain |
May. 25, 2004 |
| 6733670 |
Apparatus and method for rehabilitating a traveling bridge filter underdrain |
May. 11, 2004 |
| 6616852 |
Modular filter system |
Sep. 9, 2003 |
| 6605211 |
One-piece underdrain for swimming pool filters |
Aug. 12, 2003 |
| 6596160 |
Periodic ozone treatment system for a showering tower type water cooling system |
Jul. 22, 2003 |
| 6582595 |
Compact water conditioning apparatus |
Jun. 24, 2003 |
| 6569328 |
Underdrain filtration system with stamped perforations |
May. 27, 2003 |
| 6488842 |
Filtering device |
Dec. 3, 2002 |
| 6471857 |
Filter apparatus with sand filter bed |
Oct. 29, 2002 |
| 6461501 |
Ornamental pond skimmer and filter apparatus |
Oct. 8, 2002 |
| 6428690 |
Filter module with improved backwash capability |
Aug. 6, 2002 |
| 6423216 |
Biological oxidation filter system |
Jul. 23, 2002 |
| 6419823 |
Apparatus and method for sanitizing and cleaning a filter system |
Jul. 16, 2002 |
| 6413423 |
Liquid treatment apparatus with backwash flow control valve |
Jul. 2, 2002 |
| 6387283 |
Descending bed, continuously regenerating type filter with an adjustable length wash chamber |
May. 14, 2002 |
| 6383376 |
Method and apparatus for filtering a liquid |
May. 7, 2002 |
| 6358407 |
High turbidity wastewater purification system |
Mar. 19, 2002 |
| 6342163 |
Apparatus and method for sanitizing and cleaning a filter system |
Jan. 29, 2002 |
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