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Class Information
Number: 356/70
Name: Optics: measuring and testing > Oil testing (e.g., contamination)
Description: Subject matter including structure for determining the physical properties of liquid oil by the optical response, such as produced by visible light transmitted through or reflected from the oil.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8570497 Oil in water analyzer Oct. 29, 2013
8362429 Method and apparatus for oil spill detection Jan. 29, 2013
8195405 Method for characterizing reversible association of macromolecules at high concentration Jun. 5, 2012
8179242 Virtual engine oil quality sensor May. 15, 2012
8155891 Integrated in-line oil monitoring apparatus Apr. 10, 2012
8068218 Water in oil measurement using stabilizer Nov. 29, 2011
7911595 Liquid fuel property detection system Mar. 22, 2011
7875458 Application of test for residual wax contamination in basestocks to correlate with the low temperature viscometric properties of fully formulated oils Jan. 25, 2011
7869010 Method for evaluating purity and concentration of oils and fatty acid compositions Jan. 11, 2011
7839492 Laser-induced fluorescence fiber optic probe measurement of oil dilution by fuel Nov. 23, 2010
7764360 Fuel property detector Jul. 27, 2010
7733490 Apparatus and methods to analyze downhole fluids using ionized fluid samples Jun. 8, 2010
7688428 Non-contact oil spill detection apparatus and method Mar. 30, 2010
7612874 Method and apparatus for monitoring oil deterioration in real time Nov. 3, 2009
7518719 Contaminant analyzer for fuel Apr. 14, 2009
7466400 Device and method for automatically detecting at least one fluorescent and/or light absorbing indicator contained in a liquid service fluid during the process of filling the service fluid into Dec. 16, 2008
7408645 Method and apparatus for a downhole spectrometer based on tunable optical filters Aug. 5, 2008
7362422 Method and apparatus for a downhole spectrometer based on electronically tunable optical filters Apr. 22, 2008
7307717 Optical flow cell capable of use in high temperature and high pressure environment Dec. 11, 2007
7259017 Method of diagnosing lubricated portion and system of diagnosing lubricated portion Aug. 21, 2007
7172903 Method for on-line monitoring of lubricating oil using light in the visible and near IR spectra Feb. 6, 2007
7136155 Apparatus for measuring oil oxidation using fluorescent light reflected from oil Nov. 14, 2006
7126677 Bearing with oil film thickness measuring device Oct. 24, 2006
7003201 Flexible factory joint for metallic tubes which enclose loosely inside them optical fibers and its method of construction Feb. 21, 2006
6891606 Real-time on-line sensing and control of mineral scale deposition from formation fluids May. 10, 2005
6850317 Apparatus and methods for determining velocity of oil in a flow stream Feb. 1, 2005
6842234 Apparatus for measuring soot content in diesel engine oil in real time Jan. 11, 2005
6839137 Asphaltene aggregation in petroleum oil mixtures determined by small angle light scattering Jan. 4, 2005
6746610 Oil system, in particular a hydraulic or lubricating oil system Jun. 8, 2004
6730918 Apparatus for determining past-service conditions and remaining life of thermal barrier coatings and components having such coatings May. 4, 2004
6717658 Detection of liquids Apr. 6, 2004
6707556 Apparatus and method for analyzing fluids Mar. 16, 2004
6704109 Downhole fluorescence detection apparatus Mar. 9, 2004
6690452 Monitor having a polymer internal reflective element Feb. 10, 2004
6690453 Method and device for predicting the flocculation threshold of asphaltenes contained in hydrocarbon mixtures Feb. 10, 2004
6680777 Automatic transmission fluid tester Jan. 20, 2004
6598464 Oil and contaminants analyzer Jul. 29, 2003
6529273 Monitoring oil films Mar. 4, 2003
6490029 Automatic analysis method of crude petroleum oils using spectroscopy Dec. 3, 2002
6400277 Monitor for detecting failures of neon sign transformers Jun. 4, 2002
6184980 Fiber optic sensor for petroleum Feb. 6, 2001
6151108 On-line measurement of contaminant level in lubricating oil Nov. 21, 2000
6091484 Oil quantity and quality indicator Jul. 18, 2000
6079836 Flow cytometer droplet break-off location adjustment mechanism Jun. 27, 2000
6061139 Nondestructive diagnostic method and nondestructive diagnostic apparatus May. 9, 2000
6049388 Spectroscopic fluid sample cell Apr. 11, 2000
RE36650 Total fluid exchange system for automatic transmissions Apr. 11, 2000
6043505 Device and method for monitoring fluids with a detection of cross sectional shape of transmitted beam Mar. 28, 2000
6016191 Apparatus and tool using tracers and singles point optical probes for measuring characteristics of fluid flow in a hydrocarbon well and methods of processing resulting signals Jan. 18, 2000
5936715 On-line method and apparatus for determining the condition of circulating fluids Aug. 10, 1999

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