Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8158946 | Intrinsically safe improved sensitivity NDIR gas sensor in a can An NDIR gas sensor takes advantage of a conventional packaging embodiment commonly used to house detectors of all kinds comprising a can, header and a dish sample chamber all welded together to form a single detector unit. The can forms the top, a hollowed out heade... | 04/17/2012 |
| 8148692 | Method for ensuring the safety of the components of the drive train of a vehicle following the deterioration of the fuel The invention relates to a method of ensuring the safety of the components of the drive train of a vehicle equipped with a heat engine, before or during its startup phase following a deterioration of the quality of the fuel contained in the tank (2) and the f... | 04/03/2012 |
| 8080798 | Gas measurement system A gas measurement system includes a housing adapted to be mounted on an airway adapter, and a luminescence quenching gas measurement assembly disposed in the housing. The luminescence quenching gas measurement assembly includes a source disposed in a first plane, an... | 12/20/2011 |
| 8049174 | Chemical vapor sensor system and method thereof A chemical vapor sensor system and method are provided, wherein the system includes an air input device, a light source, a detector, a sample chamber, and a processor. The air input device includes at least a sample input port, a reference input port, and an output ... | 11/01/2011 |
| 8003945 | Intrinsically safe NDIR gas sensor in a can An NDIR gas sensor is housed within a mechanical housing made up of a can and a header housing. The header housing body contains a tunnel waveguide sample chamber. The header housing also has a top surface with a pair of windows formed in it and a signal detector, a... | 08/23/2011 |
| 7994479 | Infrared spectrometer Method and apparatus for detecting, by absorption spectroscopy, an isotopic ratio of a sample, by passing first and second laser beams of different frequencies through the sample. Two IR absorption cells are used, a first containing a reference gas of known isotopic... | 08/09/2011 |
| 7928394 | Testing device containing a gas sensor A testing device generally includes a housing having an inner cavity and at least first and second housing passageways extending from an environment outside the housing to the inner cavity. The testing device further includes a gas sensor contained within the inner ... | 04/19/2011 |
| 7851762 | Optical analysis device An optical analysis device that operates according to the principle of radiation absorption, has a housing (2) with at least one radiation-permeable housing element (3), at least one radiation source (4) having a reflector (5) associated ... | 12/14/2010 |
| 7842925 | Radiation source for a sensor arrangement with making current limitation A radiation source for an optical sensor arrangement has an incandescent lamp being switched by a semiconductor switch. The incandescent lamp emits a broadband light spectrum. The semiconductor switch has a control terminal driven by a control signal to switch a con... | 11/30/2010 |
| 7812312 | Infrared measuring device, especially for the spectrometry of aqueous systems, preferably multiple component systems The invention relates to an infrared measuring device, especially for the spectrometry of aqueous systems. Said device comprises at least one measuring unit, especially a measuring cell, also comprising at least one ATR-body and at least one infrared light source. T... | 10/12/2010 |
| 7795589 | Infrared sensor and method of calibrating the same A method includes determining a transmission of a transmissive window and a transmission of a transmissive fluid. In addition, an infrared emission of the transmissive window is determined along with an infrared emission of the transmissive fluid for at least one te... | 09/14/2010 |
| 7763856 | Producing time variation in emanating light An excitation component or arrangement can provide excitation to a moving object so that information is encoded in time variation of light emanating from the object. For example, in each of a sequence of segments, it can provide a respective non-binary excitation sp... | 07/27/2010 |
| 7741605 | Method and apparatus for detecting gas conveyed by drilling fluids A method of detecting gas conveyed in a drilling fluid (M) returning from a well (26), which method comprises the steps of: (a) extracting gas from said drilling fluid (M); (b) transmitting infra-red radiati... | 06/22/2010 |
| 7723685 | Monitoring system comprising infrared thermopile detector The present invention relates to a semiconductor processing system that employs infrared-based thermopile detector for process control, by analyzing a material of interest, based on absorption of infrared light at a characteristic wavelength by such material. In one... | 05/25/2010 |
| 7705312 | Multi-gas sensor Energy beams with different wavelengths or wavelength ranges may be passed through a gas sample in a test chamber. Ones of the energy beams may have wavelengths or wavelength ranges that are absorbed by particular gases. To determine whether any of those particular ... | 04/27/2010 |
| 7705313 | Ambient gas compensation in an optical system An optical sensor is configured to determine an amount of at least one material in a sample without interference from any of the material of interest present in an ambient environment in which the optical sensing is effected. The optical sensor may include a compens... | 04/27/2010 |
| 7679059 | Measuring water vapor in hydrocarbons Low concentrations of water vapor within a background of one or more olefin gases may be detected and quantified using a differential absorption spectrometer. A dehydrated sample of the gas is used as a background sample whose absorption spectrum allows elimination ... | 03/16/2010 |
| 7655910 | Apparatus for gas concentration measurement according to gas correlation method A gas concentration measuring apparatus utilizing a gas correlation method capable of measuring concentrations of a plurality of analyte gases simultaneously and at high sensitivity uses an infrared light source (2) such as an infrared semiconductor diode or ... | 02/02/2010 |
| 7626168 | Method for reducing condensation water in gas sensor arrangements The present invention relates to a method for measuring the presence and/or the concentration of an analyte by means of a gas sensor arrangement and to a corresponding gas sensor arrangement. The gas sensor arrangement comprises a radiation-emitting radiation source... | 12/01/2009 |
| 7601959 | Thin type vacuum chamber device The present invention is to provide a thin type vacuum chamber device, wherein two hollow slabs are fastened by a claw fastener to form a thin type simple structure that can maintain a high vacuum state, and wherein the air inside the chamber is pumped out to attain... | 10/13/2009 |
| 7598494 | Automated FTIR gas analyzer A system for certifying a concentration of gas in a cylinder includes a gas cell configured to receive a sample gas from a cylinder, and an FTIR module coupled to the gas cell for scanning the sample gas and forming a beam spectrum. A processor is coupled to the FTI... | 10/06/2009 |
| 7586094 | Background compensation by multiple-peak measurements for absorption spectroscopy-based gas sensing Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the... | 09/08/2009 |
| 7569823 | Compact near-IR and mid-IR cavity ring down spectroscopy device This invention relates to a compact cavity ring down spectrometer for detection and measurement of trace species in a sample gas using a tunable solid-state continuous-wave mid-infrared PPLN OPO laser or a tunable low-power solid-state continuous wave near-infrared ... | 08/04/2009 |
| 7535006 | Gaseous uranium hexafluride isotope measurement by diode laser spectroscopy A device and method for measuring the relative amounts of 235U and 238U in the gaseous phase of UF6 using tunable diode laser spectroscopy (TDLS). The invention is a faster, more accurate method for making such measurement. The impro... | 05/19/2009 |
| 7535007 | Multiple chamber dual channel infrared gas detection system A gas sensor usable in harsh environments includes a multiple chamber radiant energy transmission path which extends between a multi-channel emitter and a multi-channel detector. Chamber length and gas selection are establishable using a movable element with an aper... | 05/19/2009 |
| 7525093 | Liquid or gas sensor and method A fluid sensor is provided which contains a fluid cell (1) to enclose a volume of fluid (7), i.e., a gas or liquid, to be analyzed, in addition to a method for producing such a fluid sensor. An electromagnetic energy source (3) is arranged to tr... | 04/28/2009 |
| 7518113 | Pressure sensor A pressure sensor having a diaphragm which is differently deformable or locally changeable by pressure differences is described. A construction advantageously usable even in poorly accessible spaces having high temperatures is obtained in that at least one functiona... | 04/14/2009 |
| 7507967 | Infrared gas detector An infrared gas detector includes an infrared light source for emitting infrared light, an infrared sensor for detecting the infrared light from the infrared light source, and a housing having a gas cell which accommodates the infrared light source and the infrared ... | 03/24/2009 |
| 7501630 | Gas measurement system A gas measurement system of this invention includes a housing adapted to be mounted on an airway adapter, and a luminescence quenching gas measurement assembly disposed in the housing. The luminescence quenching gas measurement assembly includes a source disposed in... | 03/10/2009 |
| 7488942 | Gas sensors A gas sensor of the type having a housing defining a chamber within which light is transmitted from a source to a detector through an optical path, includes internal mirror portions having part ellipsoidal shape. Light is transmitted from a source to a detector via ... | 02/10/2009 |
| 7482591 | Carbonate scale detector An apparatus and method for detecting carbonate scale. An energy emitting device transmits energy through one optical window, through a fluid stream, and out through a second optical window where the energy is detected by an energy receiving device. As scale, such a... | 01/27/2009 |
| 7473897 | System, method, and computer program for conducting optical transmission measurements and evaluating determined measuring variables A device for conducting a transmission measurement includes a system for generating a light wave consisting of a first and a second wavelength fraction, in addition to an optical channel guiding the light wave to a sample tube with a sample, wherein the light wave p... | 01/06/2009 |
| 7473898 | Cryogenic terahertz spectroscopy A terahertz spectroscopy system includes a source of terahertz radiation, a detector of terahertz radiation, a source of sample gas, and a sample cell that can be cooled to cryogenic temperatures. The sample cell may be configured to receive the sample gas, received... | 01/06/2009 |
| 7446317 | Multipass cell for gas analysis using a coherent optical source A multi-pass gas cell that operates with reflected radiation pass through a gas, the reflected radiation transmitted and received by first and second fiber optic ports that are subject to an alignment adjustment, and a mirrored viewing window having a inner reflecti... | 11/04/2008 |
| 7442936 | Infrared spectroscopy method for measuring the base number of overbased lubricants The present invention provides a method for measuring a lubricant's total basicity by measuring one or more preselected infrared absorption bands of a lubricant and correlating the measured bands to the basicity. Preferably, the measured bands are due to carbonate o... | 10/28/2008 |
| 7435963 | Flow cell and methods of use thereof This invention provides devices and apparatuses comprising the same, for windowless optical detection of particle-laden samples, for example aerosols or fluid suspensions. The devices make use of passive sheath flow as a mechanism for containing aerosol/fluid suspen... | 10/14/2008 |
| 7435391 | Light-mediated micro-chemical reactors A chemical reactor includes two substrates that are joined along a surface and a chemical reaction chamber formed between the substrates. The chemical reaction chamber has a hollow interior and one or more light reflectors located along walls of the hollow interior.... | 10/14/2008 |
| 7432508 | Gas measurement system A gas measurement system of this invention includes a detector assembly having a beamsplitter adapted to separate infrared radiation into a first beam and a second beam and a mirror adapted to receive the first beam from the beamsplitter. The first and second beams ... | 10/07/2008 |
| 7427760 | Infrared spectrometer Method and apparatus for detecting, by absorption spectroscopy, an isotopic ratio of a sample, by passing first and second laser beams of different frequencies through the sample. Two IR absorption cells are used, a first containing a reference gas of known isotopic... | 09/23/2008 |
| 7420172 | System and method for measuring water vapor in natural gas The amount of water vapor in natural gas at different levels, including at levels below 10 ppmv, is measured by directing a light from a quantum cascade laser at a frequency in the 5.01 to 5.03 micron or the 5.07 to 50.9 micron wavelength range through natural gas c... | 09/02/2008 |
