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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7131768 | Extended temperature range EMF device A sensor and method of manufacturing an extended temperature range EMF sensor that is cost effective and highly reliable, with a stable EMF output and with an operating range of up to 1700° C. in hostile environments. The sensor is formed of highly stable dispersio... | 11/07/2006 |
| 7063457 | Fixed point cell for connection with the thermometer protecting tube and apparatus for estimating the lifetime of thermometer using the same A fixed-point cell for connection with a thermometer protecting tube and apparatus for estimating the lifetime of thermometerin the thermometer protecting tube including: a reference temperature material layer made of high-purity metallic materials to indicate a ref... | 06/20/2006 |
| 7018093 | Apparatus and method for sensing defects in temperature sensors In a temperature controlling apparatus for controlling temperature by using a temperature sensor, a defect state of the temperature sensor is sensed by sensing a change of specific resistance of the temperature sensor. A temperature value of the temperature sensor i... | 03/28/2006 |
| 6939035 | System for calibrating thermometers A device (10) for calibrating tympanic thermometers includes an enclosure (12) which may be heated or cooled depending upon the testing temperature. Within the enclosure (12) there is provided a sealed flask (14) which contains substance ... | 09/06/2005 |
| 6928860 | Heat-transfer-inhibiting motor and rotor Heat-inhibition respecting a motor is provided in connection with a heated instrument through a stand-off mount system and/or a heat-inhibiting rotor/stirrer. The instrument can be a hot bath containing instrument where stirring of the contents of the bath can be ca... | 08/16/2005 |
| 6908224 | Temperature sensor pre-calibration method and apparatus A centrifuge temperature pre-calibration apparatus including a memory storage device having correction coefficients for temperature, a controller, an un-calibrated temperature sensor and a calibrated temperature display device connected to a computer which based on ... | 06/21/2005 |
| 6854883 | Food safety thermometer A food safety thermometer is provided that is easily calibratable. The thermometer includes a digital display for displaying the temperature of food items under measurement. A calibration unit is coupled to the digital display. The calibration unit generates a calib... | 02/15/2005 |
| 6709152 | Apparatus for calibration of temperature sensors An apparatus for calibration of temperature sensors, comprising a cavity (2) for receiving a sensor (10) to be calibrated, a heat-transferring medium (5) for surrounding the sensor in the cavity, and a means for heating/cooling of the medium to ... | 03/23/2004 |
| 6663277 | Apparatus for calibration of temperature sensors There are provided an apparatus for temperature calibration of temperature sensors, and a liner for use in such an apparatus, wherein the liner (9) is adapted to be placed in a cavity (5) in a dry block (1) in the apparatus, and is arranged to receive at ... | 12/16/2003 |
| 6468438 | Method of fabricating a substrate In a method of fabricating a substrate, a substrate is submerged into a chemical bath so that the thickness of the substrate changes. The temperature of the chemical bath is monitored to ascertain a change in the thickness of the substrate.... | 10/22/2002 |
| 6447160 | Blackbody cavity for calibration of infrared thermometers A blackbody cavity having two types of wall surfaces wherein a first type has high emissivity and a second type has low emissivity. The low emissivity wall surface has an aperture from where the infrared radiation escapes the cavity, and is preferably sha... | 09/10/2002 |
| 6293695 | Triple point of water cell A triple point cell comprising: 1) An outer vessel and an inner vessel; 2) an elastomeric stopper that fits inside the open end of the outer vessel; the elastomeric stopper has two holes, one through which the inner vessel is tightly fitted, and a second ... | 09/25/2001 |
| 6197209 | Method of fabricating a substrate In a method of fabricating a substrate, a substrate is submerged into a chemical bath so that the thickness of the substrate changes. The temperature of the chemical bath is monitored to ascertain a change in the thickness of the substrate.... | 03/06/2001 |
| 6170983 | Thermometer calibrator A thermometer stem is inserted into a thermally controlled receptacle housed by the calibrator to bring the thermometer to a calibration temperature. A socket in the housing engages and holds the adjustment nut of the thermometer so that the casing of the... | 01/09/2001 |
| 5767792 | Method for calibrating a temperature sensing transponder A method of calibrating a characteristic sensor of a transponder having a memory characteristic of a host including the steps of placing a transponder in a liquid bath having a known temperature, measuring the value of the bath with the transponder, outpu... | 06/16/1998 |
| 5678923 | Thermometer calibrator A thermometer stem is inserted into a thermally controlled receptacle housed by the calibrator to bring the thermometer to a calibration temperature. A socket in the housing engages and holds the adjustment nut of the thermometer so that the casing of the... | 10/21/1997 |
| 5183337 | Thermometer calibration A black body for calibrating an infrared thermometer includes a cavity and is configured to float stably on a surface of a volume of liquid with the cavity in close thermal contact with the liquid and the opening exposed above the surface.... | 02/02/1993 |
| 5144814 | Thermistor calibration A thermistor is employed for sensing refrigerant temperature in a refrigeration system and an electronic controller continuously measures changes in resistance of the thermistor as an indication of refrigerant temperature for generating a control signal f... | 09/08/1992 |
| 4848925 | Method and device for testing of temperature control valves in the water cooling system of locomotive engines A portable device is provided herein for testing a plurality of thermostats in situ, each thermostat being connected to an associated one of heat sensing units which are located within a liquid coolant circulation system of a manifold of a locomotive engi... | 07/18/1989 |
| 4832504 | Method for measuring surface temperature of sensors A method for measuring a surface temperature of a sensor being heat-transferably contacted with a subject fluid by employing an electrically heating method in which the surface temperature is measured while passing an electrical current through an electri... | 05/23/1989 |
| 4531842 | Disposable thermometer probe and rating technique therefor A method and an apparatus for rating a thermometer probe, wherein the thermometer probe includes a small thermistor sensing element and a pair of conductors connected with the thermistor contacts and being supported upon a substrate. With the thermistor h... | 07/30/1985 |
| 4479726 | Apparatus for calibrating surface temperature measuring devices This application for calibrating surface temperature measuring devices is used in chemical processes. The apparatus is portable and comprises a cylindrical metal rod with controlled heating means of accurately known surface temperature.... | 10/30/1984 |
| 4332081 | Temperature sensor A temperature sensor is constructed as a bridge circuit using thick film technology. Both thermistor and resistor thick film inks are applied to a substrate to form a bridge circuit for producing a highly sensitive and accurate indicator when a predetermi... | 06/01/1982 |
| 4244207 | Temperature standard An improved melting point temperature standard includes a well for receiving a temperature sensor to be calibrated. Surrounding the well is a cell with a crystalline material therein. A thermally conductive spacer contacts the outer cell walls. A thermal ... | 01/13/1981 |
| 4166376 | Fluidized solids particle discharge device The described apparatus is designed to be inserted into a fluidized solids temperature calibration bath to eliminate dusting, particle impingement and test instrument temperature environmental problems.... | 09/04/1979 |
| 4145911 | Temperature sensitive liquid column measuring and calibrating apparatus An oil-filled thermometer tube is heated out and sealed. The tube is mounted with the bulb in a reference bath and sequentially moved through a reference station, a column height measuring station, a marking station and a sorting station. The measuring st... | 03/27/1979 |
| 4050289 | Method for temperature calibration of probes and the like A method of, and apparatus for, performing comparison calibrations of temperature sensors using a temperature controlled fluidized bath. The bath is operated such that prior to recording the indications of the temperature sensors the supply of fluidizing ... | 09/27/1977 |
