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Class Information
Number: 250/574
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Fluent material in optical path > Scattered or reflected light
Description: Subject matter including structure associated with the photocell or the photocell is so placed as to be responsive to light dispersed, scattered or reflected by the fluent material.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8709356 Systems and methods for minimization or elimination of diffusion effects in a microfluidic system Apr. 29, 2014
8701746 Optically detected liquid depth information in a climate control unit Apr. 22, 2014
8705038 Duct detector Apr. 22, 2014
8681012 Detectors Mar. 25, 2014
8647859 Apparatus and method for analyzing bacteria Feb. 11, 2014
8570512 System, storage mediums, and methods for identifying particles in flow Oct. 29, 2013
8552355 Smoke sensor including a current to voltage circuit having a low frequency correction means to produce a correction current Oct. 8, 2013
8531670 Optical sensor, in particular for installation in a household washing machine or dishwasher Sep. 10, 2013
8515151 Generation of frequency distribution for objects Aug. 20, 2013
8501015 Blood processing apparatus with robust automated process control Aug. 6, 2013
8471513 Rain sensor Jun. 25, 2013
8433526 Method and system for steam quality monitoring Apr. 30, 2013
8389966 Ambient light detecting device for a vehicle Mar. 5, 2013
8338774 Optical sensor with light-blocking and light-transmissive surface regions Dec. 25, 2012
8288154 Nanomotion sensing system and method Oct. 16, 2012
8289177 Circuitry to monitor and control source of radiant energy in smoke detector Oct. 16, 2012
8289178 Electro/optical smoke analyzer Oct. 16, 2012
8269202 Optical sensor device Sep. 18, 2012
8263955 Causing relative motion Sep. 11, 2012
8232885 Photoelectric smoke detector Jul. 31, 2012
8153418 Apparatus and method for analyzing bacteria Apr. 10, 2012
8106784 Combination smoke and heat detector Jan. 31, 2012
8084758 Light sensor for detecting brightness Dec. 27, 2011
8085157 Smoke detectors Dec. 27, 2011
8063373 Compact near-IR and mid-IR cavity ring down spectroscopy device Nov. 22, 2011
8062900 Optically readable microplate Nov. 22, 2011
8055471 Method of discriminating particle groups and particle analyzer Nov. 8, 2011
8049895 Instrument for measuring particle parameters Nov. 1, 2011
8030633 Methods and systems for monitoring a solid-liquid interface Oct. 4, 2011
8030082 Liquid-particle analysis of metal materials Oct. 4, 2011
7982863 Biaxial laser anemometry probe Jul. 19, 2011
7978087 Fire detector Jul. 12, 2011
7948627 Photoelectric smoke detector May. 24, 2011
7905099 Predictive maintenance method and apparatus for HVACR systems Mar. 15, 2011
7897910 System for characterizing a light field Mar. 1, 2011
7884731 Photoelectric smoke sensor and lighting equipment Feb. 8, 2011
7879619 Apparatus for detecting one or more substances and method of detecting a substance Feb. 1, 2011
7852476 Particle monitor system and substrate processing apparatus Dec. 14, 2010
7797984 Vacuum apparatus including a particle monitoring unit, particle monitoring method and program, and window member for use in the particle monitoring Sep. 21, 2010
7791056 Gas sensor for use as a fire detector Sep. 7, 2010
7777634 Scattered light smoke detector Aug. 17, 2010
7772579 Method and apparatus for simultaneously measuring a three dimensional position of a particle in a flow Aug. 10, 2010
7772794 Apparatus and method for controlling vehicular wiper Aug. 10, 2010
7763877 Drop detector system Jul. 27, 2010
7746239 Light scattering type smoke detector Jun. 29, 2010
7697140 Photoelectric smoke detector Apr. 13, 2010
7677198 Method and apparatus for growing a composite metal sulphide photocatalyst thin film Mar. 16, 2010
7658884 Photometric method and apparatus for measuring a liquid's turbidity, fluorescence, phosphorescence and/or absorption coefficient Feb. 9, 2010
7650028 Vicinal light inspection of translucent materials Jan. 19, 2010
7630537 Three-dimensional shape-measuring device Dec. 8, 2009

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