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Class Information
Number: 137/93
Name: Fluid handling > Self-proportioning or correlating systems > Mixture condition maintaining or sensing > By optical or chemical property
Description: Systems in which the condition maintained or sensed is an optical or chemical property.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8584690 Material delivery systems and methods Nov. 19, 2013
8524088 Method to inhibit scale formation in cooling circuits using carbon dioxide Sep. 3, 2013
8459290 Material gas concentration control system Jun. 11, 2013
8459291 Source gas concentration control system Jun. 11, 2013
8245978 Multiple ASM OBIGGS with different permeability and selectivity membranes Aug. 21, 2012
8196596 Method for tracking pollution source in process water Jun. 12, 2012
8118050 On-line constant flow dilution Feb. 21, 2012
8091572 Method for tracking pollution source in process water Jan. 10, 2012
7905245 Dosing control system and method Mar. 15, 2011
7810987 Automated solution maker apparatus Oct. 12, 2010
7793675 In-line gas purity monitoring and control system Sep. 14, 2010
7682066 Method for recycling waste sulfuric acid Mar. 23, 2010
7631566 Method and apparatus maintaining multi-component sample gas constituents in vapor phase during sample extraction and cooling Dec. 15, 2009
7617836 System and method for supplying functional water Nov. 17, 2009
7537018 Method and apparatus for controlling partial vapor pressure in a sorption analyzer May. 26, 2009
7448102 Method for controlling mixtures especially for fabric processing Nov. 11, 2008
7438079 In-line gas purity monitoring and control system Oct. 21, 2008
7404411 Method and apparatus for analysis of relative levels of biodiesel in fuels by near-infrared spectroscopy Jul. 29, 2008
7393450 System for maintaining pH and sanitizing agent levels of water in a water feature Jul. 1, 2008
7360550 System for recycling spent sulfuric acid, method for recycling spent sulfuric waste liquid, and recycled sulfuric acid Apr. 22, 2008
7344297 Method and apparatus for asynchronous blending and supply of chemical solutions Mar. 18, 2008
7325560 In-situ gas blending and dilution system for delivery of dilute gas at a predetermined concentration Feb. 5, 2008
7246631 Adhesive mix monitor Jul. 24, 2007
7201179 Modular fluid supply system Apr. 10, 2007
7144552 Method and apparatus for preparing chemical solutions Dec. 5, 2006
7063097 In-situ gas blending and dilution system for delivery of dilute gas at a predetermined concentration Jun. 20, 2006
6966326 Method and system for controlling withdrawal of liquid product from pipelines Nov. 22, 2005
6953044 Drained water recovery system and method for operating the same Oct. 11, 2005
6766818 Chemical concentration control device Jul. 27, 2004
6668850 Apparatus for supplying oxygen Dec. 30, 2003
6554015 Single piece silver/palladium cell for adjusting or measuring a level of hydrogen and methods therefor Apr. 29, 2003
6543493 Optical monitoring processes and apparatus for combined liquid level sensing and quality control Apr. 8, 2003
6523559 Self-regulating microfluidic device and method of using the same Feb. 25, 2003
6510368 Performance-based control system Jan. 21, 2003
6482325 Apparatus and process for separation and recovery of liquid and slurry abrasives used for polishing Nov. 19, 2002
6474354 On-line sensor for colloidal substances Nov. 5, 2002
6471845 Method of controlling chemical bath composition in a manufacturing environment Oct. 29, 2002
6453927 Method and apparatus for precisely dispensing liquids Sep. 24, 2002
6435203 Apparatus and method for regenerating etchant solution containing metal compound Aug. 20, 2002
6418958 Dual solid chemical feed system Jul. 16, 2002
6374845 System and method for sensing and controlling beverage quality Apr. 23, 2002
6253780 Method for preparing a welding fluid of constant physico-chemical characteristics with time, and a plant for its preparation Jul. 3, 2001
6245224 Water quality management system Jun. 12, 2001
6220267 Apparatus and method for controllably delivering fluid to a second fluid stream Apr. 24, 2001
6148839 Apparatus and method for injecting liquid additives into agricultural and industrial water supplies Nov. 21, 2000
6129104 Method for automotive dose control of liquid treatment chemicals Oct. 10, 2000
6077444 Method for manufacturing a system for treating water Jun. 20, 2000
6068012 Performance-based control system May. 30, 2000
6050283 System and method for on-site mixing of ultra-high-purity chemicals for semiconductor processing Apr. 18, 2000
6006775 Fuel dispensing system using a common meter and octane sensing Dec. 28, 1999

1 2 3 4

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