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Class Information
Number: 210/752
Name: Liquid purification or separation > Processes > Chemical treatment > Plural spaced feedings
Description: Process wherein at a specified interval of time or distance from the addition of the chemical the chemical is again added or a second chemical is added.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7611638 |
Method of purifying polluted water |
Nov. 3, 2009 |
| 7582269 |
Thermally autogenous subsurface chemical reactor and method |
Sep. 1, 2009 |
| 7553424 |
Method for controlling sterile water production device |
Jun. 30, 2009 |
| 7540966 |
Method and apparatus for purifying water |
Jun. 2, 2009 |
| 7517456 |
Method for treating landfill leachate |
Apr. 14, 2009 |
| 7497953 |
Water treatment apparatus and method |
Mar. 3, 2009 |
| 7419606 |
Selenium removal process |
Sep. 2, 2008 |
| 7387736 |
Pathogen reduction using chloramines |
Jun. 17, 2008 |
| 7374694 |
Method for remineralizing raw water |
May. 20, 2008 |
| 7320761 |
Method for purifying water |
Jan. 22, 2008 |
| 7273585 |
Biological fluid disposal system |
Sep. 25, 2007 |
| 7264006 |
Ozonated water flow and concentration control apparatus and method |
Sep. 4, 2007 |
| 7211194 |
Gravity pressure vessel and related apparatus and methods |
May. 1, 2007 |
| 7204929 |
Method for treating an effluent, especially a radioactive effluent, containing organic matter |
Apr. 17, 2007 |
| 7189329 |
Control of development of biofilms in industrial process water |
Mar. 13, 2007 |
| 7147783 |
Method for reducing hydrogen sulfide emissions from wastewater |
Dec. 12, 2006 |
| 7147786 |
Method and apparatus for purifying-water |
Dec. 12, 2006 |
| 7052615 |
Dispensing system |
May. 30, 2006 |
| 7052614 |
Control of development of biofilms in industrial process water |
May. 30, 2006 |
| 7008543 |
Use of chlorine dioxide and ozone for control of disinfection by-products in water supplies |
Mar. 7, 2006 |
| 6948504 |
Ozonated water flow and concentration control method |
Sep. 27, 2005 |
| 6929752 |
Method for treating waste by hydrothermal oxidation |
Aug. 16, 2005 |
| 6872318 |
Microporous diffusion apparatus |
Mar. 29, 2005 |
| 6843925 |
Method for stabilizing chlorine in aqueous solution |
Jan. 18, 2005 |
| 6773668 |
Detergent dispenser |
Aug. 10, 2004 |
| 6773607 |
Ballast water treatment for exotic species control |
Aug. 10, 2004 |
| 6749758 |
Methods and systems for uniform-control of bromine concentrations in water |
Jun. 15, 2004 |
| 6716354 |
Methods of treating water using combinations of chlorine dioxide, chlorine and ammonia |
Apr. 6, 2004 |
| 6716360 |
Method and apparatus for treating waste streams |
Apr. 6, 2004 |
| 6605253 |
Intervention techniques for reducing carcass contamination |
Aug. 12, 2003 |
| 6592767 |
Apparatus and method for ozone-treating biosludges |
Jul. 15, 2003 |
| 6551518 |
Combined ozonation and electrolytic chlorination water purification method |
Apr. 22, 2003 |
| 6533942 |
Cooling tower water cleaning system |
Mar. 18, 2003 |
| 6495051 |
Methods for preparing blood or plasma component solutions with improved concentrations |
Dec. 17, 2002 |
| 6436297 |
Defluoridation of waste water |
Aug. 20, 2002 |
| 6423234 |
Air and water purification using continuous breakpoint halogenation |
Jul. 23, 2002 |
| 6419837 |
Process for destroying contaminants in contaminant-containing aqueous streams and catalysts used therefor |
Jul. 16, 2002 |
| 6409926 |
Air and water purification using continuous breakpoint halogenation and peroxygenation |
Jun. 25, 2002 |
| 6395175 |
Method and apparatus for energy efficient self-aeration in chemical, biochemical, and wastewater treatment processes |
May. 28, 2002 |
| 6379549 |
Method for treating water incorporating a sedimentation tank and a multilayer filter operating at high speeds |
Apr. 30, 2002 |
| 6346197 |
Water and wastewater treatment system and process for contaminant removal |
Feb. 12, 2002 |
| 6293731 |
Method for treatment of dredged materials to form a structural fill |
Sep. 25, 2001 |
| 6287473 |
Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling control |
Sep. 11, 2001 |
| 6287471 |
Treatment of aqueous effluents by injection of carbon dioxide |
Sep. 11, 2001 |
| 6284143 |
Microporous diffusion apparatus |
Sep. 4, 2001 |
| 6284293 |
Method for generating oxygenated water |
Sep. 4, 2001 |
| 6277288 |
Combined ozonation and electrolytic chlorination water purification method |
Aug. 21, 2001 |
| 6264847 |
Method of processing cyanide ions by ozone |
Jul. 24, 2001 |
| 6214240 |
Method for ozone treatment using a mixture of ozone and hydrogen peroxide |
Apr. 10, 2001 |
| 6207064 |
Ozone contact chamber |
Mar. 27, 2001 |
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