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Class Information
Number: 250/577
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Fluent material in optical path > Volume or level
Description: Subject matter including structure associated with the photocell or the placement of the photocell to specifically detect the volume or elevation of a contained fluent material.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8701746 Optically detected liquid depth information in a climate control unit Apr. 22, 2014
8658962 Optical switch with glowable activator portion Feb. 25, 2014
8638426 Sea clutter identification with a laser sensor for detecting a distant seaborne target Jan. 28, 2014
8584715 Optical filling control of pharmaceutical capsules in capsule filling machines Nov. 19, 2013
8550301 Liquid dispensing apparatus Oct. 8, 2013
8507886 Optical sensor system on a device for the treatment of liquids Aug. 13, 2013
8479643 Water circulation system for a beverage preparation device Jul. 9, 2013
8338811 Optical level detector for a beverage machine Dec. 25, 2012
8334501 Optical switch activator with glowable member Dec. 18, 2012
8333461 Ink cartridge for inkjet printer Dec. 18, 2012
8283647 Developer liquid level sensor Oct. 9, 2012
8072594 Liquid level sensor Dec. 6, 2011
8067760 Impulse analysis for flow sensor-based fluid control system Nov. 29, 2011
8058635 Apparatus and method for the continuous optical determination of the fill level of liquids in liquid tanks of vehicles or airplanes Nov. 15, 2011
7982201 System and method for detection of liquid level in a vessel Jul. 19, 2011
7956341 System and method of non-invasive continuous level sensing using a linear sensor array Jun. 7, 2011
7935948 Method and apparatus for monitoring and control of suck back level in a photoresist dispense system May. 3, 2011
7851775 Gear-type drink-o-meter to monitor fluid consumption Dec. 14, 2010
7847276 Impulse analysis for flow sensor-based fluid control system Dec. 7, 2010
7838859 Fluid overfill probe with thermal stress prevention Nov. 23, 2010
7820995 Component for a household appliance, in particular for a dishwasher, and sump for a household appliance, in particular for a dishwasher, using it Oct. 26, 2010
7786457 Systems and methods of non-invasive level sensing for a surgical cassette Aug. 31, 2010
7772538 Float activated optical switch Aug. 10, 2010
7767991 Method of operating an infrared drip sensor in an enteral pump system to reduce false alarm conditions Aug. 3, 2010
7758696 Methods and systems for monitoring a solid-liquid interface Jul. 20, 2010
7710567 Systems and methods for determining level and/or type of a fluid May. 4, 2010
7663130 System and method of determining fluid levels in containers including an infrared device for detecting a first value associated with an empty portion of a container Feb. 16, 2010
7635854 Method and apparatus for optical level sensing of agitated fluid surfaces Dec. 22, 2009
7633048 Fast laser scanning optical CT apparatus Dec. 15, 2009
7595479 Tilt detector and tilt detecting method for the same Sep. 29, 2009
7589340 System for detecting a container or contents of the container Sep. 15, 2009
7521703 Automatic analyzer Apr. 21, 2009
7499581 Vision system to calculate a fluid volume in a container Mar. 3, 2009
7446317 Multipass cell for gas analysis using a coherent optical source Nov. 4, 2008
7399985 Optical non-contact sensor for detecting material level in a container Jul. 15, 2008
7388222 High-temperature optical liquid level sensor Jun. 17, 2008
7323705 Liquid level measurement Jan. 29, 2008
7307739 System and method for detecting dropping amount of liquid crystal Dec. 11, 2007
7285793 Coordinate tracking system, apparatus and method of use Oct. 23, 2007
7259383 Optical transducer for detecting liquid level Aug. 21, 2007
7259384 Fluid level optical detector with float having opaque and transmissive portions Aug. 21, 2007
7161165 Optical transducer for continuously determining liquid level Jan. 9, 2007
7157727 Optical detector able to sense the presence of a container and content therein, and container and printer using the same Jan. 2, 2007
7141815 Fiber optic-based probe for use in saltwater and similarly conductive media as found in unenclosed natural environments Nov. 28, 2006
7115894 Method to determine the lubricant filling degree of a fluid dynamic bearing Oct. 3, 2006
7116236 Oil tank sight glass monitor Oct. 3, 2006
7109513 Use of wicking means to manage fluids on optical level sensing systems Sep. 19, 2006
7055926 Liquid container, method for detecting liquid amount in liquid container, and liquid ejection recording apparatus Jun. 6, 2006
7057199 Apparatus and method for the measurement of water depth using a controlled receiver Jun. 6, 2006
7049622 Optical position sensor for determining the interface between a clear and an opaque fluid May. 23, 2006

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