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Class Information
Number: 210/139
Name: Liquid purification or separation > With time control > Of additional fluid
Description: Apparatus which introduces to the treating means a fluid in addition to that being treated.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7413649 |
Treatment apparatus with modular chemical containing units having one-way valve assemblies |
Aug. 19, 2008 |
| 7390419 |
Waste water recovery system |
Jun. 24, 2008 |
| 7314546 |
Disinfectant system and method for the chemical treatment of wastewater |
Jan. 1, 2008 |
| 7175054 |
Method and apparatus for disinfecting a refrigerated water cooler reservoir |
Feb. 13, 2007 |
| 7144509 |
Process and apparatus for waste water treatment |
Dec. 5, 2006 |
| 7048861 |
System and method for in-well aeration |
May. 23, 2006 |
| 6936170 |
Methods and apparatus for biological treatment of aqueous waste |
Aug. 30, 2005 |
| 6780319 |
Method and installation for treating effluents, comprising an additional treatment of the sludge by ozonization |
Aug. 24, 2004 |
| 6770206 |
Method and apparatus for handling liquid waste in a wet-well |
Aug. 3, 2004 |
| 6767464 |
Process and apparatus for waste water treatment |
Jul. 27, 2004 |
| 6740231 |
Self-contained cooling system feed and bleed system |
May. 25, 2004 |
| 6630067 |
Methods and apparatus for biological treatment of aqueous waste |
Oct. 7, 2003 |
| 6620315 |
System for optimized control of multiple oxidizer feedstreams |
Sep. 16, 2003 |
| 6596159 |
Automatic regeneration valve for water softener |
Jul. 22, 2003 |
| 6576130 |
Absorption field reclamation and maintenance system |
Jun. 10, 2003 |
| 6524471 |
Backwash control system for a filter unit used in a machine tool system |
Feb. 25, 2003 |
| 6402954 |
Method and apparatus for monitoring and cleaning a fluid filter system |
Jun. 11, 2002 |
| 6379540 |
Method and apparatus for flushing contaminants from a container of fluids |
Apr. 30, 2002 |
| 6332978 |
Apparatus for reducing nitrate concentration in wastewater |
Dec. 25, 2001 |
| 6126819 |
Apparatus for the treatment of liquids contaminated by foreign substances |
Oct. 3, 2000 |
| 6086754 |
Dispensing apparatus having an improved filter unit |
Jul. 11, 2000 |
| 6063295 |
Apparatus and method to increase oxygen levels in livestock drinking water |
May. 16, 2000 |
| 6054044 |
Apparatus and methods for wastewater treatment from high volume livestock production |
Apr. 25, 2000 |
| 5985155 |
Method and apparatus for automatic adjustment of halogen production in a water treatment system |
Nov. 16, 1999 |
| 5961845 |
Solid product system and method of using same |
Oct. 5, 1999 |
| 5944649 |
Method and device for the supply of control liquid to a centrifugal separator |
Aug. 31, 1999 |
| 5914047 |
On-site biohazardous liquid medical waste collection and treatment system and method of using such system |
Jun. 22, 1999 |
| 5866002 |
Apparatus for activation of a digesting agent and method of its use |
Feb. 2, 1999 |
| 5792343 |
Brine supply system |
Aug. 11, 1998 |
| 5788836 |
Sewage treatment system |
Aug. 4, 1998 |
| 5759387 |
Grey water filter tank recovery system and filter backwashing system |
Jun. 2, 1998 |
| 5690818 |
Spray sludge suppression system |
Nov. 25, 1997 |
| 5614086 |
Method and apparatus for removing contaminants from a water supply |
Mar. 25, 1997 |
| 5582719 |
Filtration system |
Dec. 10, 1996 |
| 5575913 |
Filtration apparatus and method for removing particulate contaminants from commercial laundry waste water |
Nov. 19, 1996 |
| 5556535 |
Filtration system for recycling water used in a car wash |
Sep. 17, 1996 |
| 5468375 |
Wastewater pretreatment tank assembly |
Nov. 21, 1995 |
| 5462673 |
Cleaning system for vibratory screening devices |
Oct. 31, 1995 |
| 5422014 |
Automatic chemical monitor and control system |
Jun. 6, 1995 |
| 5366619 |
Germfree drinking water dispenser |
Nov. 22, 1994 |
| 5362401 |
Method and apparatus for cleaning a filter apparatus |
Nov. 8, 1994 |
| 5320748 |
Acid dispensing system for a swimming pool |
Jun. 14, 1994 |
| 5268094 |
Wastewater processing apparatus |
Dec. 7, 1993 |
| 5232584 |
Method and apparatus for purifying and compacting solid wastes |
Aug. 3, 1993 |
| 5186821 |
Wastewater treatment process with cooperating velocity equalization, aeration and decanting means |
Feb. 16, 1993 |
| 5182008 |
Filtration assembly |
Jan. 26, 1993 |
| 5156745 |
Induced gas liquid coalescer and flotation separator |
Oct. 20, 1992 |
| 5152252 |
Water treatment control system for a boiler |
Oct. 6, 1992 |
| 5151197 |
Fluid treatment |
Sep. 29, 1992 |
| 5139663 |
Discharge valve for dissolved air flotation |
Aug. 18, 1992 |
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