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Class Information
Number: 324/717
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > Lumped type parameters > Using resistance or conductance measurement > With voltage or current signal evaluation > Including a particular probing technique (e.g., four point probe) > To determine material composition
Description: Subject matter wherein the voltage or current signal evaluation or processing is used to determine the quantity, quality or percentage of substances that make up the test object.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7606667 |
Mass spectrometry analysis method and system |
Oct. 20, 2009 |
| 7563530 |
Fuel amount control system for fuel cell |
Jul. 21, 2009 |
| 7483735 |
Apparatus and method for monitoring body composition by measuring body dielectric constant and body impedance based on the method of frequency digital sampling |
Jan. 27, 2009 |
| 7459920 |
Method of and apparatus for non-destructively measuring moisture content of dried objects |
Dec. 2, 2008 |
| 7362109 |
Gem tester using electrical photoconductivity |
Apr. 22, 2008 |
| 7185545 |
Instrumentation and method for monitoring change in electric potential to detect crack growth |
Mar. 6, 2007 |
| 7135872 |
Method of determining the composition of a multiphase fluid |
Nov. 14, 2006 |
| 7068054 |
Real-time carbon sensor for measuring concentration profiles in carburized steel |
Jun. 27, 2006 |
| 6952652 |
System and method for sample detection based on low-frequency spectral components |
Oct. 4, 2005 |
| 6819121 |
Method and apparatus for measurement of concrete cure status |
Nov. 16, 2004 |
| 6815974 |
Determining composition of mixed dielectrics |
Nov. 9, 2004 |
| 6791334 |
Oil condition sensor and method for making the same |
Sep. 14, 2004 |
| 6788076 |
Apparatus for determining doping concentration of a semiconductor wafer |
Sep. 7, 2004 |
| 6636055 |
Multifrequency equipment for sensing the state of electrodes in electric-arc furnaces |
Oct. 21, 2003 |
| 6580280 |
Multilayered gas sensor and a related gas concentration detecting system |
Jun. 17, 2003 |
| 6566853 |
Molten metal inclusion sensor probes |
May. 20, 2003 |
| 6525549 |
Method for determining the concentration of a substance in a liquid by measuring electrical current in a test strip |
Feb. 25, 2003 |
| 6468478 |
Oxygen concentration sensor element impedance detecting apparatus and method |
Oct. 22, 2002 |
| 6466038 |
Non-isothermal electromigration testing of microelectronic packaging interconnects |
Oct. 15, 2002 |
| 6439766 |
Diamond detecting apparatus and method |
Aug. 27, 2002 |
| 6380745 |
Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material |
Apr. 30, 2002 |
| 6300778 |
Solder paste and residue |
Oct. 9, 2001 |
| 6265884 |
Electrical conductivity gem tester |
Jul. 24, 2001 |
| 6167300 |
Electric mammograph |
Dec. 26, 2000 |
| 6084418 |
Method for accurately detecting sensor element resistance |
Jul. 4, 2000 |
| 6058934 |
Planar hematocrit sensor incorporating a seven-electrode conductivity measurement cell |
May. 9, 2000 |
| 6034520 |
Method of determination of active ions by electric conductivity and electric conductivity metering system therefor |
Mar. 7, 2000 |
| 6005399 |
Solder paste and residue measurement system |
Dec. 21, 1999 |
| 5999004 |
Method of detecting a change in the property of a rubber member |
Dec. 7, 1999 |
| 5889396 |
Method and device for measuring the quantity of an active principle contained in a reservoir |
Mar. 30, 1999 |
| 5861750 |
Geophysical methods and apparatus for determining the hydraulic conductivity of porous materials |
Jan. 19, 1999 |
| 5861751 |
Electrical geophysical methods and apparatus for determining the in-situ density of porous material |
Jan. 19, 1999 |
| 5789910 |
Molten metal inclusion sensor probes |
Aug. 4, 1998 |
| 5763879 |
Diamond probe tip |
Jun. 9, 1998 |
| 5749986 |
Control of batching and curing processes |
May. 12, 1998 |
| 5744972 |
Device and method to measure the complex permeability of thin films at ultra-high frequencies |
Apr. 28, 1998 |
| 5668479 |
Multipurpose sensor for belt conveyor |
Sep. 16, 1997 |
| 5656940 |
Apparatus for measuring the surface resistance and electrical resistivity of a homogeneous resistive material at high temperature |
Aug. 12, 1997 |
| 5635845 |
Detection of cross-linking in pre-cure stage polymeric materials by measuring their resistance |
Jun. 3, 1997 |
| 5532600 |
Method of and apparatus for evaluating reliability of metal interconnect |
Jul. 2, 1996 |
| 5528154 |
Page identification with conductive traces |
Jun. 18, 1996 |
| 5497098 |
Microwave sensor for identifying the surface properties of a workpiece and associated method |
Mar. 5, 1996 |
| 5391994 |
Method for measuring surface resistivity using square electrodes and multiplying surface resistance measurements by a correction factor |
Feb. 21, 1995 |
| 5260667 |
Method and apparatus for determining the percentage water condent of oil in water emulsion by specific admittance measurement |
Nov. 9, 1993 |
| 5241262 |
Continuous-use molten metal inclusion sensor |
Aug. 31, 1993 |
| 5126679 |
Shelled corn moisture tester |
Jun. 30, 1992 |
| 5097212 |
Cell for measuring electrical conductivity and ion content of vapor |
Mar. 17, 1992 |
| 5049812 |
Device for the electric characterization of samples and application to electric mapping of large area semiconductor samples |
Sep. 17, 1991 |
| 5012197 |
Apparatus and method for determining the relative percentages of components in a mixture |
Apr. 30, 1991 |
| 4996493 |
Instantaneous ice detection system |
Feb. 26, 1991 |
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