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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 |
| 7442228 | Method and device for controlling the proportion of crystals in a liquid-crystal mixture The invention relates to a method for controlling the proportion of aluminum crystals in a mixture of molten aluminum alloy and aluminum crystals. The electrical resistance of the mixture is determined with the aid of a four-point measurement. With the aid of the me... | 10/28/2008 |
| 7357826 | Method and apparatus to monitor/detect nodularization in ductile iron The present invention is direct to a method/apparatus for verifying a nodularization process in a molten iron disposed within a ladle. The method includes the steps of: transferring the ladle with the molten iron to a nodularization area; adding an amount of magnesi... | 04/15/2008 |
| 7233886 | Adaptive modeling of changed states in predictive condition monitoring An improved empirical model-based surveillance or control system for monitoring or controlling a process or machine provides adaptation of the empirical model in response to new operational states that are deemed normal or non-exceptional for the process or machine.... | 06/19/2007 |
| 7036554 | Method and system for casting metal and metal alloys The invention is relating to a system for casting metal, the system comprising a holding furnace (3) containing a base metal melt (2), at least one casting crucible (1) mounted inside the holding furnace (3) and situated at least partly i... | 05/02/2006 |
| 7004225 | Injection molding machine for low-melting point metallic material An injection molding machine for low-melting point metallic material has an injection mechanism having a melting cylinder, an injection device, and a driving device. The driving device is disposed on the rear end of the melting cylinder for driving the injection dev... | 02/28/2006 |
| 6902696 | Overflow transfer furnace and control system for reduced oxide production in a casting furnace An apparatus for transferring molten metal from a melting furnace to a casting furnace is provided. A sensing and control system for the transfer of molten metal from a transfer furnace to a casting furnace is also described. The combination of the transfer apparatu... | 06/07/2005 |
| 6767382 | Aluminium processing apparatus and process for separating aluminium from a mixture of aluminium and aluminium dross An apparatus for separating molten aluminium from a mixture of molten aluminium and aluminium dross includes a table for supporting an insulated crucible containing the mixture of molten aluminium and aluminium dross. A rotatable frame supports a plurality of tines ... | 07/27/2004 |
| 6699306 | Control method for copper density in a solder dipping bath This method controls a copper density in a dip solder bath holding a molten solder alloy containing at least copper as an essential composition thereof during a dip soldering step of one of a printed circuit board with a surfaced copper foil and a compone... | 03/02/2004 |
| 6695936 | Methods and apparatus for using large inertial body forces to identify, process and manufacture multicomponent bulk metallic glass forming alloys, and components fabricated therefrom To identify and manufacture metallic glass forming alloys, large inertial forces or "g"-forces are used to sequentially separate crystalline phases (particles) as they sequentially form and grow in a molten alloy during gradual cooling of the alloy below ... | 02/24/2004 |
| 6666902 | Ladle refining apparatus and ladle refining method using it The present invention provides a lade refining apparatus capable of suppressing skull deposition in a vacuum/decompression chamber and performing molten steel agitation, slag reforming and degassing efficiently, and a ladle refining method using the appar... | 12/23/2003 |
| 6579339 | Copper scrap processing system A system is described for forming a recycled copper product from at least one copper scrap feedstock source containing at least one contaminant. A pre-determined maximum weight percentage of the contaminant in the recycled copper product is initially esta... | 06/17/2003 |
| 6562100 | Material supply and melting method in injection molding of metal material The invention has an object to permit to make the accumulation amount and the temperature of molten metal in the metal material molding machine constant, by performing material supply and melting taking the accumulation amount as reference during the mold... | 05/13/2003 |
| 6517604 | Apparatus and method for measuring the molten metal level in electromagnetic continuous casting An apparatus and method for measuring the level of a free surface of molten metal in an electromagnetic continuous casting process using an AC electromagnetic field. A detection coil is provided to detect the sum of a magnetic field applied from an induct... | 02/11/2003 |
| 6517603 | Method for recovery of metals having low vaporization temperature A method for reducing metal oxides in a shaft furnace. A charge of metal oxide and a reductant is reacted in the furnace to produce a primary metal of the metal oxide and an additional secondary metal. The temperature of the off gas from the reaction is c... | 02/11/2003 |
| 6503292 | Molten metal treatment furnace with level control and method A molten metal treatment furnace (10) with metal treatment and level control includes a heating chamber (12) for containing and heating a supply of molten metal (60), a pump (22) connected to the heating chamber (12), a molten metal treatment chamber (16,... | 01/07/2003 |
| 6500228 | Molten metal dosing furnace with metal treatment and level control and method A dosing furnace (10) with metal treatment and level control includes a holding chamber (12) for containing a supply of molten metal (50), a pump (22) connected to the holding chamber (12), a molten metal treatment chamber (16, 18) located at an outlet (2... | 12/31/2002 |
| 6478847 | Copper scrap processing system A system is described for forming a recycled copper product from at least one copper scrap feedstock source containing at least one contaminant. A pre-determined maximum weight percentage of the contaminant in the recycled copper product is initially esta... | 11/12/2002 |
| 6309442 | Refractory material sensor for determining level of molten metal and slag and method of using An apparatus and method for indexing the slag-metal interface level in a metallurgical container uses an insulating refractory brick having a plurality of embedded conductor wires. Distal ends of the conductor wires are exposed at know, fixed distances fr... | 10/30/2001 |
| 6264716 | Process for controlling the stirring energy delivered by a gas flowing through a liquid A process for stirring molten steel in a container. In this process, argon gas is introduced into the container at a flow rate of from about 0.005 to about 0.2 cubic feet of argon per ton of molten steel per minute, the extent to which said container is c... | 07/24/2001 |
| 6171364 | Method for stable operation of a smelter reactor A process of producing molten iron involves: a) introducing iron oxide, flux, oxygen, nitrogen, carbon, and hydrogen to a smelter reactor; b) maintaining conditions to cause (i) the iron oxide to be reduced, (ii) molten iron to be created and stirred in the bo... | 01/09/2001 |
| 6019811 | Metals processing control by counting molten metal droplets Apparatus and method for controlling metals processing (e.g., ESR) by melting a metal ingot and counting molten metal droplets during melting. An approximate amount of metal in each droplet is determined, and a melt rate is computed therefrom. Impedance o... | 02/01/2000 |
| 6004504 | Method and apparatus for controlling bath level and measurement of bath characteristics A method and apparatus for improved control of continuous electric arc furnace steelmaking in which a charge velocity detector measures charge velocity of metallic charge introduced to the furnace. A charge mass detector measures a charge mass of metallic... | 12/21/1999 |
| 5948137 | Scrap metal measuring and weighing process and apparatus An on-line system for measuring the composition of scrap metal, including a loader with a load sensor having a motion compensator linked to a bulk material analyzer such as a prompt gamma-ray neutron activation analyzer. The grade of scrap used to prepare... | 09/07/1999 |
| 5908488 | Magnesium melting furnace and method for melting magnesium The magnesium melting furnace (1) has a plurality of chambers. The material to be melted is fed into a melting chamber (2) through a charging chute (20), one end of which terminates under the surface of the melting bath. The melt is slowly transferred int... | 06/01/1999 |
| 5885322 | Method for reducing iron losses in an iron smelting process A process of smelting iron that comprises the steps of: a) introducing a source of iron oxide, oxygen, nitrogen, and a source of carbonaceous fuel to a smelting reactor, at least some of said oxygen being continuously introduced through an overhead lance; b) m... | 03/23/1999 |
| 5884685 | Quality prediction and quality control of continuous-cast steel A rapid analysis device for analyzing nonmetallic inclusions in steel by a cold crucible method is combined with a mathematical model, and the quality of cast steel is predicted online by simulating the behavior. of the nonmetallic inclusions by calculati... | 03/23/1999 |
| 5669955 | Process for producing pig iron from iron ores, and applicance for the thermal and/or chemical treatment of a readily disintegrating material or for producing pig iron by means of said process A process for producing pig iron from iron ores involves the iron ores traveling from the top downwards through a reduction unit via a succession of oblique trays which are staggered in a cascade-like manner. A hot reduction gas containing carbon monoxide... | 09/23/1997 |
| 5669956 | Apparatus and method for molten metal depth detection Apparatus and method for determining when the depth of molten (18) poured into a vessel (12) has reached a selected level. A conduit (22) connected to a source of pressurized gas and having an orifice (43) at its distal end (38) restricts the flow of gas ... | 09/23/1997 |
| 5567222 | Method of controlling slag coating of a steel converter A method of controlling slag coating in a steel converter in which slag is left in the converter after tapping, and a slag solidifying agent is added to the slag to form a coated slag which is used to coat the bottom and/or side wall surface of the conver... | 10/22/1996 |
| 5500033 | Melt heating method A method of heating a melt containing an oxidizable substance in which a fuel is burned with an oxidant by projecting fuel oxidant jets over the melt. The fuel and the oxidant jets have a fuel jet momentum and an oxidant jet momentum, respectively. The ox... | 03/19/1996 |
| 5417738 | Method for recovering metals included in the slag generated from steel making process A method for recovering useful metal included in slag generated from steel-making process in a convertor. The method comprises the steps of atomizing the slag in water, screening the atomized slag so as to be classified by sizes, dropping the classified s... | 05/23/1995 |
| 5405121 | Apparatus to indicate the oxygen content of molten copper using the vibration signal of a graphite rod immersed into the molten metal The purpose of this invention is to present an apparatus consisting of a graphite rod, a vibration signal sensor, a signal processing unit, a data processing unit, and a data display unit to indicate the oxygen content of a copper melt. As such graphite r... | 04/11/1995 |
| 5330555 | Process and apparatus for manufacturing low-gas and pore-free aluminum casting alloys The invention relates to a process and apparatus for manufacturing low-gas and pore-free aluminum casting alloys by vacuum degasification and densification of the melt. Contact between the aluminum melt and the atmospheric humidity of the alloying process... | 07/19/1994 |
| 5327357 | Method of decarburizing molten metal in the refining of steel using neural networks A method of decarburizing molten metal in the refining of steel using neural networks with a first neural network trained to analyze data representative of many process periods of one or more decarburization operations for providing an oxygen count for a ... | 07/05/1994 |
| 5246482 | Molten metal producing and refining method The disclosure relates to a molten metal producing and refining method which does not damage the apparatus, realizes a stable and high second combustion rate, and is capable of effectively recovering heat generated by the second combustion. The method com... | 09/21/1993 |
| 5196050 | Control method of and apparatus for material charging at a top of a blast furnace In a control method of material dumping at top of a blast furnace, in which material stored in a furnace top bunker is dumped through a flow rate control gate into a blast furnace in a specified time, value of initial material weight before the transfer s... | 03/23/1993 |
| 5131634 | Sublimer-reactor system with weighing means A sublimer-reactor system for reducing Group IVB metals with magnesium has a sublimer spaced from a reactor with a gas flow control valve in piping interconnecting them. A load cell weighs the feed in the sublimer and outputs a signal to the control valve... | 07/21/1992 |
| 5108495 | Method controlling a process by impedance analysis The invention relates to a method for controlling a process operating by means of the electrochemical potential, in which process complex ores and/or concentrates are treated in order to arrange the valuable components in the materials in a form appropria... | 04/28/1992 |
| 5078785 | Method of operating in-bath smelting reduction furnace A method of operating an in-bath smelting reduction furnace comprises the step of forming a slag zone in an in-bath smelting reduction furnace supplied with oxygen through a top lance and with agitation gas by bottom bubbling through tuyeres below the met... | 01/07/1992 |
| 5028258 | Process of controlling the slag in a top-blowing steelmaking converter In the operation of a top-blowing steelmaking converter having at least one blowing lance, the distance of said lance from the surface of the molten metal bath is controlled in dependence on the sound levels of the blowing noise measured through the slag ... | 07/02/1991 |
