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