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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5992437 |
Method for diluting acid or alkaline stock solution and apparatus therefor |
Nov. 30, 1999 |
| 5993671 |
Method for manufacturing a system for treating reclaimed water to provide treated water |
Nov. 30, 1999 |
| 5960808 |
Method of controlling the amount of sanitizing agent in an aqueous medium |
Oct. 5, 1999 |
| 5924794 |
Chemical blending system with titrator control |
Jul. 20, 1999 |
| 5921263 |
Fuel dispensing system using a common meter and octane sensing |
Jul. 13, 1999 |
| 5887611 |
Gas blender |
Mar. 30, 1999 |
| 5887610 |
Method and plant for regulating the composition of the atmosphere in an enclosure |
Mar. 30, 1999 |
| 5879079 |
Automated propellant blending |
Mar. 9, 1999 |
| 5855791 |
Performance-based control system |
Jan. 5, 1999 |
| 5832948 |
Liquid transfer system |
Nov. 10, 1998 |
| 5829466 |
Fluid treatment system |
Nov. 3, 1998 |
| 5826632 |
Dynamic gas cylinder filling process |
Oct. 27, 1998 |
| 5826749 |
Multiplexed system for dispensing multiple chemicals to multiple destinations |
Oct. 27, 1998 |
| 5823219 |
System and method for producing and maintaining predetermined proportionate mixtures of fluids |
Oct. 20, 1998 |
| 5758641 |
Continuous-flow oxygen valve for oxygen rebreathers |
Jun. 2, 1998 |
| 5723517 |
System for controlling the color of compounded polymer(s) using in-process color measurements |
Mar. 3, 1998 |
| 5674382 |
Wet oxidation apparatus with compressor |
Oct. 7, 1997 |
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