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Class Information
Number: 210/333.1
Name: Liquid purification or separation > Plural distinct separators > Filters > With residue removal or liquid agitation > Backwash or blowback > Sequential backwash
Description: Apparatus having means to successively clean the filter units.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7407573 |
Quick countercurrent-type water purifier |
Aug. 5, 2008 |
| 7282188 |
Method and device for producing a metal hydroxide |
Oct. 16, 2007 |
| 7276223 |
Method and device for chemical reaction between a gas and at least one compound in solution carried out in the presence of a solid catalyst |
Oct. 2, 2007 |
| 7250109 |
Back-wash filter |
Jul. 31, 2007 |
| 7105090 |
Backflushing filter |
Sep. 12, 2006 |
| 7070695 |
Ultrafiltration and microfiltration module and system |
Jul. 4, 2006 |
| 7052610 |
Immersed membrane filtration system and overflow process |
May. 30, 2006 |
| 6893568 |
Immersed membrane filtration system and overflow process |
May. 17, 2005 |
| 6890434 |
Backflush filter, in particular for filtering lubricant oil |
May. 10, 2005 |
| 6861000 |
Running method and washing method for spiral wound membrane element and spiral wound membrane module |
Mar. 1, 2005 |
| 6827864 |
Filtering apparatus and method for washing its filtering elements |
Dec. 7, 2004 |
| 6799687 |
System and method for linear object reallocation in place |
Oct. 5, 2004 |
| 6682652 |
Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes |
Jan. 27, 2004 |
| 6607660 |
Liquid filtration device with backwashing feature |
Aug. 19, 2003 |
| 6596165 |
Filtering apparatus |
Jul. 22, 2003 |
| 6592758 |
Filter element for a liquid-state process stream |
Jul. 15, 2003 |
| 6543624 |
Back-washable filter for liquids |
Apr. 8, 2003 |
| 6432310 |
Methods of running and washing spiral wound membrane module |
Aug. 13, 2002 |
| 6395182 |
METHOD FOR PURIFYING WATER, IN PARTICULAR GROUND WATER, UNDER ANAEROBIC CONDITIONS, USING A MEMBRANE FILTRATION UNIT, A DEVICE FOR PURIFYING WATER, AS WELL AS DRINKING WATER OBTAINED BY USING |
May. 28, 2002 |
| 6325922 |
Filter device for cleaning plastics melts |
Dec. 4, 2001 |
| 6197192 |
Filter array with connector for successive backwash |
Mar. 6, 2001 |
| 6153093 |
Filter screen pack for extrusion die |
Nov. 28, 2000 |
| 6120688 |
Portable reverse osmosis unit for producing drinking water |
Sep. 19, 2000 |
| 6004465 |
System and process for iodine recovery |
Dec. 21, 1999 |
| 6001254 |
Method of operating and monitoring a group of filter membrane modules, and a group of modules implementing the method |
Dec. 14, 1999 |
| 5975311 |
Filter to be inserted into a pipe and heat exchanger equipped with a filter of this kind |
Nov. 2, 1999 |
| 5972228 |
Filters employing "filling bodies" to reduce the amount of backwashing fluid remaining in the filters after backwashing |
Oct. 26, 1999 |
| 5804062 |
Water treatment plant with clarifier and peripheral filter |
Sep. 8, 1998 |
| 5785870 |
Variable flow filter unit |
Jul. 28, 1998 |
| 5770072 |
Multiple inlet valve with means to isolate each inlet individually and direct a reverse flow therethrough |
Jun. 23, 1998 |
| 5770067 |
Device for filtering a fluid |
Jun. 23, 1998 |
| 5762783 |
Filter flushing arrangement |
Jun. 9, 1998 |
| 5647980 |
Apparatus and method for treating waste water from a residential home |
Jul. 15, 1997 |
| 5643455 |
Concentration of solids in a suspension using hollow fibre membranes |
Jul. 1, 1997 |
| 5635066 |
Pressure filter with a back-flushing head exerting a uniform contact pressure |
Jun. 3, 1997 |
| 5607593 |
Installation for making water potable with submerged filtering membranes |
Mar. 4, 1997 |
| 5593583 |
Filter for continuous filtration of liquids containing solids in a closed cylindrical vessel |
Jan. 14, 1997 |
| 5575911 |
Back-flushable filter having valved flusing pathway |
Nov. 19, 1996 |
| 5560828 |
Method for the removal of components causing turbidity, from a fluid, by means of microfiltration |
Oct. 1, 1996 |
| 5547574 |
Apparatus for filtering mineral slurries |
Aug. 20, 1996 |
| 5516426 |
Self-cleaning filter system |
May. 14, 1996 |
| 5512174 |
Filtering device for the clarification of liquids |
Apr. 30, 1996 |
| 5417856 |
Filter apparatus for fluids to be cleaned |
May. 23, 1995 |
| 5393423 |
Filter apparatus |
Feb. 28, 1995 |
| 5354466 |
Filtration system with improved backwashing capability |
Oct. 11, 1994 |
| 5330642 |
Method of filtering cellulose acetate solutions as well as a plant for carrying out the method |
Jul. 19, 1994 |
| 5296140 |
Continuous filtration device |
Mar. 22, 1994 |
| 5275728 |
Device to separate solid matter from a stream of liquid |
Jan. 4, 1994 |
| 5268095 |
Self-cleaning filter |
Dec. 7, 1993 |
| 5254246 |
Water reclamation system |
Oct. 19, 1993 |
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