Patents
Sitemap › G01 - Measuring; Testing › G01N - Investigating or analysing materials by determining their chemical or physical properties › G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
Patents for G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (109,839)
04/1990
04/04/1990EP0361046A2 Constrained uniform field gel electrophoresis
04/04/1990EP0360862A1 Isotope-ratio-monitoring gas chromatography-mass spectrometry apparatus and method
04/04/1990CN2055597U Full-plastic ring shape black lead electrode conduction tank
04/04/1990CN1041039A Multifunctional differential-potential digestion instrument
04/04/1990CN1041038A Inflammable detector and fast detecting method
04/03/1990US4914425 Highly sensitive smoke detector
04/03/1990US4914424 Oxygen concentration monitor using galvanic cell type oxygen sensor
04/03/1990US4914395 Method and apparatus for detecting pinhole
04/03/1990US4914378 Method and apparatus for inspecting surface defects
04/03/1990US4914293 Microscope apparatus
04/03/1990US4913793 Mixture of anionic, cationic exchange polymers
04/03/1990US4913792 Flammable-gas sensor
04/03/1990US4913791 Blot frame and method of handling
04/03/1990US4913780 Redox electrode for determining nitrous acid and nitrosyl compounds
04/03/1990US4912822 Method of making an integrated scanning tunneling microscope
03/1990
03/31/1990WO1990005840A1 Process and device for establishing at least one threshold voltage for a lambda closed-loop control
03/29/1990DE3904612A1 Test method and test device for steel-wire-armoured conveyor belts, especially for underground operation
03/28/1990EP0360677A1 Method and equipment for the identification of DNA bases
03/28/1990EP0360676A1 Method for sequencing of nucleic acids
03/28/1990EP0360159A2 Method of producing thick-film gas sensor element having improved stability
03/28/1990EP0359831A1 Biosensor and process for its production
03/28/1990EP0112862B1 A method and an apparatus for performing routine analysis such as polarographic or spectrophotometric analysis
03/28/1990CN2055255U High temp. high pressure sterilization ph sensor
03/28/1990CN1040866A Transducer for detecting hydrogen sulfide in atomosphere
03/27/1990US4912418 Method and device for detecting the location of a fault within a dielectric layer of an electrically conducting pipe
03/27/1990US4912417 Measurement of pH and specific ion concentration
03/27/1990US4912411 Magneto acoustic emission apparatus for testing materials for embrittlement
03/27/1990US4912325 Method for sample analysis by sputtering with a particle beam, and device to implement said method
03/27/1990US4912041 In electrolytic cell containing oligosaccharide, enzyme
03/27/1990US4911914 Method for producing an exhaust gas sensor
03/27/1990US4911892 Apparatus for simultaneous detection of target gases
03/27/1990US4911890 Device for quickly sensing the amount of O2 in a combustion product gas
03/27/1990US4911820 Apparatus for measuring hydrogen cyanide vapor content in the air
03/27/1990US4911819 Electrochemical measuring cell having a compensating membrane
03/27/1990US4911817 Buffer solution
03/27/1990US4911816 Applying electricity to tray between walls
03/27/1990US4911808 Mobilization of focused protein zones by ion introduction
03/27/1990US4911807 Separation medium inserted into soluble migration path
03/27/1990US4911806 Separating dielectrics
03/27/1990US4911800 Electrochemically controlled superconductivity
03/27/1990US4911794 Measuring with zero volume cell
03/27/1990US4911130 Air-fuel ratio controller of internal combustion engine
03/27/1990US4910998 Fluid detection system and method having a coaxial cable with solid, stranded dielectric elements
03/27/1990CA1267212A1 Method and apparatus for determining the charging of charcoal filters
03/27/1990CA1267047A1 Methods and arrangements for characterizing magnetic coating compositions as well as improving magnetic particle dispersions
03/22/1990WO1990002943A1 Paste-like preparation for performance testing and/or cleaning of amperometric sensors
03/22/1990WO1990002942A1 Automatic separator of macromolecules or fragments thereof
03/22/1990WO1990002941A1 Process and instrument for a three component measurement
03/22/1990WO1990002940A1 Three component ratio measuring process and three component ratio measuring instrument
03/22/1990WO1990002939A1 Apparatus for measuring parameters in a moving fluid
03/22/1990WO1990002938A1 Disposable sensing device for real time fluid analysis
03/22/1990WO1990002829A1 Electropolymer coated microelectrodes
03/22/1990WO1990002792A1 Biochemical sensor responsive to bubbles
03/22/1990WO1990002601A1 Process and device for controlled migration of macromolecules in rectangular gel plates by multiple electrophoresis
03/22/1990DE3832034A1 Testing device for ferromagnetic tubes and/or rods
03/22/1990DE3831970A1 Membrane system for controllable separation of substances by changeable permeation
03/22/1990DE3831879A1 Potentiostatic sensor
03/22/1990DE3831531A1 Method and apparatus for detecting fluorine compounds
03/22/1990DE3825139A1 Elektrochemischer messfuehler Electrochemical measurement sensor
03/21/1990EP0359652A2 Sensor for the angular detection of defects in a metallic tube by eddy currents
03/21/1990EP0359619A1 Automaton for separating macromolecules or their fragments
03/21/1990EP0359589A2 Pulsed oriented electrophoresis
03/21/1990EP0359473A2 A method of determining the amount of the substances or ions contained in an ionic solution or a non-deionized solution and a crystal oscillator used therefor
03/21/1990EP0359124A2 Method for counter-flow gas analysis
03/21/1990EP0359107A2 High voltage electrophoresis apparatus
03/21/1990EP0358925A2 Catalytic combustion type CO gas sensor
03/21/1990EP0358761A1 Electrode
03/21/1990EP0358706A1 Added array of molecular chains for interfering with electrical fields
03/21/1990EP0358693A1 Sintered pellet with biochemically active layer
03/21/1990EP0179129B1 Self-calibrating single-use sensing device for clinical chemistry analyzer
03/21/1990CN1040683A Combined gel electrophoresis spool with verticle plates
03/20/1990US4910463 Halogen monitoring apparatus
03/20/1990US4909977 Molding; insertion of core into gel; setting; removal of core
03/20/1990US4909922 Electrochemical cell; heating element
03/20/1990US4909921 Enzyme-immobilized film
03/20/1990US4909920 Automatic electrophoresis apparatus and method
03/20/1990US4909919 Quantitative analysis
03/20/1990US4909918 Disposable comb for electrophoresis device
03/20/1990US4909908 Measuring concentration of hydrogen peroxide yielding substrate
03/20/1990US4909091 Method and apparatus for the detection of corrosion or the like
03/20/1990US4909078 Fluid flow detector
03/20/1990US4909072 Measurement and control of exhaust gas recirculation with an oxygen pumping device
03/20/1990US4909070 Moisture sensor
03/20/1990US4909066 Thick-film gas sensor of a laminar structure and a method of producing the same
03/20/1990CA1266924A1 Fourier transform quadrupole mass spectrometer and method
03/15/1990DE3831272A1 Method and apparatus for measuring the absorption rate of swellable materials
03/15/1990DE3830073A1 Lambda probe
03/15/1990DE3829793A1 Process and measuring means for determining the quality of liquid fluxes, in particular in automatic soldering apparatus
03/14/1990EP0358556A1 Method and apparatus for multiple electrophoresis ensuring controlled migration of macromolecules in layers of gel
03/14/1990EP0358250A2 Method and apparatus for liquid phase calibration of oxigen and carbon dioxide partial pressure
03/14/1990EP0358212A2 Reactive gas sample introduction system for an inductively coupled plasma torch
03/14/1990EP0358168A2 Method, apparatus and probe for measuring the activity of a solute element in molten metal
03/14/1990EP0357823A1 Device for testing metallic work pieces
03/14/1990CN1007193B Sensing element for combustible gas
03/13/1990US4908575 Circuit for measuring diffusion-limited current
03/13/1990US4908119 Apparatus for determining oxygen concentration
03/13/1990US4908118 Solid electrolyte body of nasicon, titsicon, khibinskite, waldeite, or alumina, detector electrode, reference electrode
03/13/1990US4908117 Solid state reference electrode
03/13/1990US4908116 Structure in wall surrounding axis for containing tube and confining electrolytic solution; permits ion to flow through
03/13/1990US4908115 Bundle of carbon fibers covered with nonconducting resin, the ends of the fibers being recessed from one end of the resin, and apertures being provided to the outside
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