Patents for G05D 21 - Control of chemical or physico-chemical variables, e.g. ph-value (1,435) |
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10/27/1998 | US5828582 Automatic control of endothermic gas generators using low cost oxygen sensing probes |
10/14/1998 | EP0870535A1 Ultra-pure chemical products dilution system for use in the microelectronic industry |
10/13/1998 | US5822220 Process for controlling the efficiency of the causticizing process |
09/23/1998 | EP0866395A1 Method and device for controlling the input quantity of a treating medium for reducing the nitrogen concentration in the exhaust gases of a burning process |
09/21/1998 | CA2232721A1 Method and apparatus for controlling the amount of a treatment medium introduced in order to reduce the nitrogen oxide content of the exhaust gases from combustion processes |
09/17/1998 | DE19710652A1 Miniaturised modular bio-technical cell cultivation assembly |
09/16/1998 | EP0864953A1 Monitoring installation for an atmosphere generating apparatus |
09/02/1998 | EP0861460A1 Device and process for adjusting ion concentrations |
09/02/1998 | CN1192222A Method for controlling chemical synthesis processes |
09/01/1998 | US5801317 Oxygen/carbon dioxide sensor and controller for a refrigerated controlled atmosphere shipping container |
08/26/1998 | EP0859654A1 A method for adjusting a separation process and an apparatus for use by the method |
08/11/1998 | US5792342 Apparatus for coordinating chemical treatment of sewage |
07/22/1998 | CN1188546A Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors |
07/09/1998 | WO1998029787A1 On-line control of a chemical process plant |
07/09/1998 | DE19719637C1 Assembly which controls discharge of flocculant agent into piped sludge through |
07/08/1998 | CN1186974A Sio probe for real-time monitoring and control of oxygen during czochralski growth of single crystal silicon |
06/30/1998 | CA2021545C Treatment of alkaline streams |
06/10/1998 | EP0710218A4 Monitoring biological activity in wastewater |
05/28/1998 | WO1998022813A1 pH ALTERING DEVICE AND METHOD |
05/06/1998 | CN2280944Y Control instrument for testing acid, alkali and salt ion concentration |
05/05/1998 | US5747342 Methods and apparatus for monitoring and controlling PH phosphate and sodium to phosphate ratio in boiler systems operating with captive alkalinity |
05/05/1998 | US5746806 Direct current voltage and ac current motors |
04/14/1998 | US5738772 In-line/on demand reaction delivery system and method |
03/31/1998 | US5734098 Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors |
03/25/1998 | EP0831384A1 Methods and systems for controlling olfactory stimuli |
03/25/1998 | EP0830394A1 Method for controlling chemical synthesis processes |
03/19/1998 | WO1998007082A3 Apparatus and method for controlling output of an oxygen concentrator |
03/18/1998 | EP0829010A1 Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors |
03/12/1998 | WO1998010137A1 Process and apparatus for controlling the efficiency of causticizing process |
03/10/1998 | US5726884 Integrated hazardous substance tracking and compliance |
03/10/1998 | US5725001 Dishwasher with pH-controlled program pre-selection |
03/04/1998 | EP0630202B1 Self-optimizing detergent controller |
03/03/1998 | US5723517 Color control in polymers |
02/19/1998 | WO1998007082A2 Apparatus and method for controlling output of an oxygen concentrator |
02/19/1998 | CA2264107A1 Apparatus and method for controlling output of an oxygen concentrator |
12/16/1997 | US5698163 Control system for processes using supercritical fluids |
12/09/1997 | US5696696 Apparatus and method for automatically achieving and maintaining congruent control in an industrial boiler |
12/02/1997 | US5693204 A housing comprising an erodible matrix plenum between the intakes and discharging; quatitative analysis of residual chlorine |
11/13/1997 | DE19617528A1 Apparatus for controlling addition of flocculent to sludge |
11/06/1997 | DE19718455A1 Dispensing appts. for dispensing ground coffee into coffee packages |
11/04/1997 | US5682916 Cooling tower conductivity control timing circuit |
10/28/1997 | US5682317 Virtual emissions monitor for automobile and associated control system |
10/23/1997 | DE19645246A1 Sewage water structure for mixed effluent-water and rainwater drainage |
10/02/1997 | WO1997036178A1 Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors |
09/24/1997 | EP0746770A4 Automated method for controlling the rate of chlorine dioxide generation |
09/23/1997 | US5671153 Chemical reactor feed control |
09/03/1997 | EP0678203B1 METHOD FOR THE CONTINUOUS MEASUREMENT AND ADJUSTMENT OF THE pH OF AN ACIDIC LIQUID, pH MEASUREMENT BEING BY MEANS OF A GLASS ELECTRODE |
07/02/1997 | EP0781588A2 Oxygen concentration or humidity controlling apparatus |
07/01/1997 | US5643797 Process of continuously controlling the pH of an acid liquid including measuring the pH continuously with a glass electrode |
06/24/1997 | US5641410 Mixing reservoir; electrical signals associated with sensors indicate water flow rates and qualities |
05/22/1997 | WO1997018503A1 Device and process for adjusting ion concentrations |
05/20/1997 | US5631845 Method and system for controlling phosphate bath constituents |
04/22/1997 | US5623105 Oxygen/carbon dioxide sensor and controller for a refrigerated controlled atmosphere shipping container |
04/17/1997 | DE19537669A1 Dishwashing machine controlled by pH value |
04/16/1997 | EP0768589A2 Method and system for controlling phosphate bath constituents |
04/11/1997 | CA2187504A1 Dishwasher with ph-controlled program pre-selection |
03/27/1997 | WO1997010884A1 A method for adjusting a separation process and an apparatus for use by the method |
03/27/1997 | DE19533927A1 On-line measuring of water concn. |
02/25/1997 | US5606495 Device for controlling air pollution |
02/20/1997 | DE19530086A1 Treatment of surface or waste water |
12/27/1996 | WO1996041822A1 Method for controlling chemical synthesis processes |
12/27/1996 | WO1996041675A1 Process and device for controlling a reverse osmosis system for water treatment |
12/19/1996 | WO1996041245A1 On-line continuous monitor to optimize coagulant and flocculent feed in wastewater and paint spray booth systems |
12/19/1996 | DE19520912A1 Reverse osmosis process for supply of pure water for blood dialysis |
12/17/1996 | US5586305 Smart distributed measurement and control system with a flexible architecture |
12/17/1996 | US5586051 Chemical reactor feed control |
12/12/1996 | WO1996039650A1 Liquid enzyme doser |
12/12/1996 | DE19520917A1 Reverse osmosis assembly used in conjunction with blood dialysis units, etc. |
12/11/1996 | EP0746770A1 Automated method for controlling the rate of chlorine dioxide generation |
12/03/1996 | US5580444 Water quality monitor for a water purification system |
11/27/1996 | EP0705431A4 Temperature stabilized fluid calibration system |
11/20/1996 | EP0606456B1 Arrangement for continuously monitoring the no concentration in gas mixtures |
11/20/1996 | CN1135934A 化学反应器进料控制 Chemical reactor feed control |
11/19/1996 | US5576970 Nitrogen oxide removal control method |
11/14/1996 | WO1996035983A1 Control system for processes using supercritical fluids |
10/22/1996 | US5567283 Caustic concentration regulator for chlorine generators |
10/17/1996 | WO1996032669A1 Method of controlling the heat-treatment process in a pelleting plant |
10/17/1996 | DE19513547A1 Verfahren zum Steuern des Wärmebehandlungsprozesses in einer Pelletieranlage A method for controlling the heat treatment process in a pelletizing plant |
10/16/1996 | CN1133447A Material feeding control for chemical reactor |
10/02/1996 | EP0481001B1 System and method for monitoring substances and reactions |
09/24/1996 | US5559173 System for controlling the color of compounded polymer(s) using in-process color measurements |
09/17/1996 | US5556478 Self-optimizing detergent controller for minimizing detergent set-point overshoot |
09/04/1996 | EP0643672B1 Method of controlling wastewater purification plants using quality evaluation of measuring data |
09/03/1996 | US5552319 Real time monitoring of dissolved oxygen in activated sludge,nadh metabolism, fluorescence |
09/03/1996 | US5551468 Fluidic density control for chlor alkali cells |
08/28/1996 | EP0729085A1 Chemical reactor feed control |
08/28/1996 | EP0729084A1 Chemical reactor feed control |
08/20/1996 | US5547578 Method of controlling waste water purification plants using quality evaluation of measuring data |
07/24/1996 | CN1127500A Monitoring biological activity in wastewater |
07/23/1996 | US5539638 Virtual emissions monitor for automobile |
07/02/1996 | US5531905 System and method to control laundry waste water treatment |
06/20/1996 | DE19520914C1 Verfahren und Vorrichtung zur Regelung einer Umkehrosmoseanlage zur Wasseraufbereitung Method and apparatus for controlling a reverse osmosis system for water treatment |
06/19/1996 | EP0717243A1 Neutralisation device |
06/18/1996 | US5527450 Water conductivity monitor for a water purification system |
05/30/1996 | DE4442418A1 Dosing unit for batch addn. of flocculant to aq. sludge from storage |
05/22/1996 | EP0712509A1 Virtual continuous emission monitoring system with sensor validation |
05/22/1996 | EP0712463A1 Virtual emissions monitor for automobile |
05/14/1996 | US5515693 Enable system for a controlled atmosphere system for a refrigerated container |
05/08/1996 | EP0710218A1 Monitoring biological activity in wastewater |
05/01/1996 | CN2226315Y AC frequency-change type auto-controller for adding chemicals |