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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 |
| 7377288 | Passive device for balancing the pressure of first and second fluids and the use thereof The device comprises a first valve (35a) and a second valve (35b) each comprising a chamber (13a, 13b) communicating via an admission orifice (19a, 19b) with a circuit or a receptacl... | 05/27/2008 |
| 7111671 | Heat exchanger having air drying device A heat exchanger includes a container having an outlet and an entrance coupled to an inlet and an exit, a receptacle having an entering port and a discharging port for circulating a fluid medium and having an entering opening and a discharging opening. A casing is d... | 09/26/2006 |
| 7107782 | Evaporative heat exchanger and method The heat exchange apparatus and method is provided with an indirect evaporative heat exchange section and a direct evaporative heat exchange section. An evaporative liquid is sprayed downwardly into the direct evaporative section to directly exchange heat from the e... | 09/19/2006 |
| 7081805 | Constant-power constant-temperature resistive network A thermally stabilized device is described. Single or multiple input ports are accommodated and single and multiple power ports are described. The variation of resistance of a resistor subject to varying power dissipations is minimized by injecting complementary pow... | 07/25/2006 |
| 7057893 | Cooling array A cooling array including a housing accommodating electrical built-in components and an air conditioning device that is connected to a heat source of the electrical built-in components by a coolant-carrying inlet line and a return line. To simply air-condition compl... | 06/06/2006 |
| 7000691 | Method and apparatus for cooling with coolant at a subambient pressure An apparatus includes heat-generating structure disposed in an environment having an ambient pressure, and a cooling system for removing heat from the heat-generating structure. The cooling system includes a fluid coolant, structure which reduces a pressure of the c... | 02/21/2006 |
| 6945065 | Cooling/heating system of air conditioner Cooling/heating system of air conditioner including a duct having a first passage for drawing external air, and a second passage for drawing room air, the second passage having a part crossed with the first passage, a regenerative heat exchanger having first and sec... | 09/20/2005 |
| 6938434 | Cooling system A system is disclosed that incorporates a generator for generating a liquid coolant. This invention provides a self-contained water (or similar liquid coolant) chilling system of suitable capacity to cool small to medium size structures, such as private residences a... | 09/06/2005 |
| 6937471 | Method and apparatus for removing heat from a circuit An apparatus includes a circuit having a heat-generating circuit component, and structure for guiding a two-phase coolant along a path which brings the coolant into direct physical contact with either the circuit component or a highly thermally conductive part which... | 08/30/2005 |
| 6923043 | Method and device for detecting a leak in a heat exchanger, especially a plate-type heat exchanger The invention relates to a device for detecting a leak between two circuits of a plate-type heat exchanger (1) provided with means for filling two circuits with fluid at a different pressure, characterized in that said device comprises automatic control means... | 08/02/2005 |
| 6564864 | Method of operating low profile heat exchange method with reduced water consumption A method of exchanging heat is disclosed. Process fluid is passed through a dry indirect contact heat exchange section while a main air stream is also passed through that section. The process fluid is passed through a second indirect contact heat exchange... | 05/20/2003 |
| 6213200 | Low profile heat exchange system and method with reduced water consumption A system and method of exchanging heat are disclosed. Three heat exchange sections are used: a dry indirect contact heat exchange section, a second indirect contact heat exchange section that is operable in either a wet or dry mode, and a direct contact h... | 04/10/2001 |
| 5363905 | Method of controlling heat exchangers using enthalpy flow as the correcting variable A method of controlling a heat exchanger wherein the enthalpy flow into the heat exchanger serves as a correcting variable. The robust and versatile control method is particularly suitable for use in endothermic reactions and for distillation.... | 11/15/1994 |
| 5190095 | Condenser for refrigerator and method of operating the same A condenser for a refrigerator and a method of operating the condenser, in which heat exchanger tubes for cooling the condenser each have brush receivers and cooling water inlet/outlet ports at both ends thereof, one of the brush receivers accommodating a... | 03/02/1993 |
| 4765946 | Intrinsically safe emergency cooling device for a pressurized-water nuclear reactor Intrinsically safe emergency cooling device for a pressurized-water nuclear reactor, comprising an auxiliary circuit which feeds the steam generator and in which is arranged a condenser (10) receiving the steam from the generator and condensing it. The co... | 08/23/1988 |
| 4728485 | Method for regulating the pressure of the primary circuit during the shut-down phases of a pressurized water nuclear reactor Method for regulating the pressure of the primary circuit of a pressurized water nuclear reactor during shut-down phases, by use of an installation comprising, as a branch circuit to the primary circuit, a volume control circuit with a discharge valve and... | 03/01/1988 |
| 4620588 | Three fluid heat exchanger with pressure responsive control A three fluid heat exchanger in which first and second fluids are in a normally flowing heat transfer relation, with flow of a third fluid being dependent on a changing condition of one of the first or second fluids. Tubular heat exchanger cores are compr... | 11/04/1986 |
| 4527620 | Apparatus for controlling thermal transfer in a cyclic vacuum processing system Apparatus for providing thermal transfer between a semiconductor wafer and a heat sink or source in a vacuum processing chamber includes a platen against which the wafer is sealed to define a thermal transfer region therebetween. The platen includes a pas... | 07/09/1985 |
| 4461340 | Oil cooler An oil cooler comprises a heat exchanger through which the oil passes and which is cooled by a fan. The fan is provided with variable pitch blades so that a variable flow rate of cooling air may be directed on to the heat exchanger. The pitch of the blade... | 07/24/1984 |
| 4319628 | Two liquid heat exchange system and safety valve to prevent contamination A two liquid heat exchange system, and a safety valve to prevent contamination of one liquid (first liquid) by the other. In systems such as hydronic solar systems, it is customary for a first liquid to be heated and run through a heat exchanger where its... | 03/16/1982 |
| 4312401 | Heat transfer system A heat transfer system for transferring heat into a first body of water flowing through a first conduit (20, 22, 24) from a heated second body of water (12) that is flowing through a second conduit (14), the two conduits being contiguous to each other. A ... | 01/26/1982 |
| 4303122 | Flue heat recovery device A flue heat recovery device for furnaces or boilers comprises a rectangular housing with a corrosion-resistant or corrosion-proof wall in the housing dividing the space into an air chamber and a flue gas chamber. The flue gas chamber has a gas inlet openi... | 12/01/1981 |
| 4272962 | Pressure controller for dual purpose steam turbine power plant At least one heat exchanger section including a conventional heat exchanger is disposed in a dual purpose steam turbine power plant to utilize steam extracted from the steam turbine to one section of the heat exchanger for the purposes of heating process ... | 06/16/1981 |
| 3977466 | Room air conditioning apparatus A room air conditioning apparatus for exchanging heat and/or moisture between fresh atmospheric air entering the room from the outside and consumed air being discharged from the room combines high capacity with relatively small dimensions, low air velocit... | 08/31/1976 |
