Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7250071 | Method of manufacturing austenitic stainless steel having less susceptibility to cracking during forming A new austenitic stainless steel containing approximately 0.1-1.0 mass % of Si and not more than approximately 0.003 mass % of Al. Nonmetallic inclusions dispersed in a steel matrix are converted to MnO—SiO2—Al2O3 containing not ... | 07/31/2007 |
| 7172640 | Method and device for melting down metal-containing materials In a method and a device for melting down metal-containing material, preferably fine-particulate metal-containing material, such as sponge iron, in a metallurgical melting furnace (1), wherein, in an interior space (11) of the melting furnace (1... | 02/06/2007 |
| 7094271 | Method for producing stainless steels, in particular high-grade steels containing chromium and chromium-nickel The invention relates to a method for producing stainless steels, in particular steels containing chromium and chromium-nickel. The method is carried out in a melting device containing a metallurgical vessel, or in a melting device (1) containing at least two... | 08/22/2006 |
| 6238453 | Producing stainless steels in parallel operated vessels A process for producing stainless steels, particularly special steels containing chromium and chromium-nickel, in a smelting arrangement having at least two vessels, for supplying a steel foundry. A charge having mostly iron-containing raw scrap materials... | 05/29/2001 |
| 5931985 | Process and device for blowing oxygen-containing gas with and without solid material on a metal melt in a metallurgical vessel A process for blowing oxygen-containing gas, with and without solid material, on a metal melt in a metallurgical vessel, a process for generating a burner flame and corresponding devices. The inventive process and lance suitable for such process provides,... | 08/03/1999 |
| 5762682 | Method and apparatus for processing ferrous materials In steel-making, there are conflicting processing requirements at different stages of the process. The method and apparatus of the invention creates different processing conditions at different stages of the process. Molten ferrous material (2) is stirred... | 06/09/1998 |
| 5567224 | Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame Method of reducing metal oxide in a rotary hearth furnace (14) to make a feed stock for a refining vessel when manufacturing alloyed iron, alloyed steel or stainless steel. The rotary hearth furnace includes an annular inner refractory wall (32), an annul... | 10/22/1996 |
| 5368631 | Desulfurization agent A method for desulfurizing molten pig-iron involving injecting a gas-evolving desulfurization agent which includes a calcium compound and a gas forming material comprising of a gas-producing compound, a slag-forming agent and magnesium.... | 11/29/1994 |
| 5139569 | Process for the production of alloy steel grades using treatment gas consisting of CO2 In secondary steel refining, in addition to the process gas oxygen, the gases nitrogen and argon are employed as treatment gases in the bottom blowing converter. Oxygen and argon can be partially replaced by inexpensive CO2. The invention provi... | 08/18/1992 |
| 4931090 | Pneumatic steelmaking vessel and method of producing steel The invention encompasses a pneumatic steelmaking vessle and a method for the production of steel from hot carbon-bearing metallized raw materials such as direct reduced iron. The vessle is a refractory-lined ladle, having an eccentric ladle cover with an... | 06/05/1990 |
| 4808220 | Process for the preparation of refined ferromanganese The invention relates to a process for the preparation of low-carbon and low-silicon ferromanganese (refined ferromanganese) by blowing with pure oxygen in a converter ferromanganese of high carbon content (high-carbon ferromanganese) produced in a blast ... | 02/28/1989 |
| 4772317 | High alloy steel making The process includes two major phases, each including a converter blowing step and a discharge step, whereby the first discharge step is also a preparatory step for the second blowing step. The steel is dephosphorized, desulfurized, and decarbonized under... | 09/20/1988 |
| 4762555 | Process for the production of nodular cast iron A process for the production of nodular cast iron is disclosed. The process comprises adding magnesium to molten iron and then desulphurizing the melt. Next, the melt is after-treated with a neutral gas. The neutral gas which is introduced into the melt m... | 08/09/1988 |
| 4761178 | Process for heating molten steel contained in a ladle The temperature of molten steel in a ladle is raised to a predetermined level by introducing a plurality of oxygen containing gas streams beneath the surface of molten steel and introducing a predetermined quantity of an oxidizable fuel, such as aluminum ... | 08/02/1988 |
| 4684402 | Method of waste disposal, and apparatus for the same A method of and an apparatus for heating, melting, waste disposal and production of gaseous fuel include supplying air, coal, steam and waste into a melt. The melt contains elements readily oxidized by air and producing oxides which are readily reduced by... | 08/04/1987 |
| 4615730 | Method for refining molten metal bath to control nitrogen A method for refining a molten metal bath is provided including introducing a refining gas containing substantially a combination of oxygen and nitrogen to the molten bath to reduce the carbon content of the bath to a selected level; thereafter an inert g... | 10/07/1986 |
| 4560406 | Process for refining of chromium-containing molten steel The refining of chromium-containing molten steel by the treatments of decarburization, reduction, and desulfurization is improved in terms of consumption of argon gas used for blowing molten steel, amount of refractories of an AOD furnace, and CaO and CaF... | 12/24/1985 |
| 4557758 | Steelmaking process A process of making steel from solid metal iron-bearing materials, especially metal scrap, in an oxygen converter comprises heating and melting the charge by supplying a fuel and an oxidizing agent in the direction from the bottom upwardly and from the si... | 12/10/1985 |
| 4525211 | Process for producing a microkilled steel suitable for freerun continuous casting for subsequent cold forming In order to produce a microkilled steel suitable for free-run continuous casting for subsequent cold forming standardizing of the C - content to ࣘ0.05%, preferably ࣘ0.03%, Si - content to ࣘ0.05%, preferably 0.02-0.04%, and Al - content to ࣘ0.006% ... | 06/25/1985 |
| 4518422 | Process and apparatus for refining steel in a metallurgical vessel A process and apparatus for the desulphurization, deoxidation and purification of a metal melt is presented. The process is particularly well suited for use in a ladle during the refining of steel. The present invention comprises means for defining at the... | 05/21/1985 |
| 4512802 | Process for the decarburization of molten metal A computer implemented process for optimizing the decarburization of a predetermined mass of molten metal by controlling the amount of coolants, the charging time of coolants, the dilution ratio of injected oxygen to inert gas, the changing time of the di... | 04/23/1985 |
| 4488903 | Rapid decarburization steelmaking process A decarburization procedure for rapidly decarburizing a steel melt comprising top injection of oxygen and powdered lime and bottom injection of oxygen and inert gas, discontinuance of the top injection at a specified time, and decarburization to the aim c... | 12/18/1984 |
| 4465513 | Process to control the shape of inclusions in steels A process which enables one to employ calcium as an inclusion shape control additive without need for complicated addition procedures.... | 08/14/1984 |
| 4451288 | Method for producing low hydrogen content in steels produced by subsurface pneumatic refining The production of low hydrogen steel is achieved in subsurface pneumatic refining processes by proper melt practice ensuring adequate gas sparging during the overall refining sequences, minimal time delays in the latter stages of refining, and proper cont... | 05/29/1984 |
| 4439234 | Method of increasing the cold material charging capacity in the top-blowing production of steel Pig iron is refined by top blowing with oxygen and injecting inert gas from the bottom. The slag formation is minimized by controlled addition of lime to match the formation of slag components as they are generated by the process. This increases the capac... | 03/27/1984 |
| 4436553 | Process to produce low hydrogen steel Steel is produced by the argon-oxygen decarburization process which has a low hydrogen content, generally below 2 ppm.... | 03/13/1984 |
| 4358314 | Metal refining process A process for refining steel by top blowing with below melt tuyere injection in which at the commencement of the refining cycle the refining gas lance is located at a pre-determined height above the melt, and the gas flow rate to the below melt tuyere or ... | 11/09/1982 |
| 4356032 | Method of dephosphorizing molten pig iron A method of dephosphorizing molten pig iron, wherein molten pig iron is charged into a refining vessel provided at its bottom with tuyeres for blowing gas and, if necessary, at its top with a gas injecting member, and a powdery refining agent together wit... | 10/26/1982 |
| 4308057 | Steel making by converter Steel making by a converter comprises blowing oxygen onto the surface of molten steel held in the converter and blowing agitating gases of 1/3 to 1/3000 of the amount of said oxygen thereinto from tuyeres provided at bottom of the converter, which number ... | 12/29/1981 |
| 4278464 | Method for preventing slopping during subsurface pneumatic refining of steel The desired tap temperature may be obtained, without slopping, during subsurface pneumatic refining of steel by the addition to the melt of an oxidizable fuel material, such as aluminum, after decarburization has been substantially completed or after the ... | 07/14/1981 |
| 4187102 | Method for controlling the temperature of the melt during pneumatic refining of steel The method enables the desired tap temperature to be obtained during subsurface pneumatic refining of carbon steel or low alloy steel, without the need to reblow the heat, by adding to the melt, before starting the injection of refining oxygen, a fast oxi... | 02/05/1980 |
| 4135916 | Process in the manufacture of steels containing nickel The invention provides a process of producing steels containing nickel, particularly corrosion-resistant steels, which involves refining the metal bath obtained from the smelting of a ferro-nickel by adding to said metal bath in a refining converter ferro... | 01/23/1979 |
| 4121923 | Crystalline structure in continuously cast steel ingot The steel in a tundish is treated under pressure to add Ca, Mg or a rare earth for reducing dendritic and enhancing globulitic crystallation.... | 10/24/1978 |
| 4105439 | Method for production of refined steel In a method of producing successive heats of refined steel wherein successive charges of molten, impure iron are refined by oxygen in the presence of at least one flux to form molten, refined steel and liquid slag, followed by the separation of said molte... | 08/08/1978 |
| 4099964 | Recycling of iron values A method for recycling iron values such as the iron which is present in the iron oxide, primarily Fe3 O4 found in millscale and other fine or waste materials containing oxides of iron. The method is applicable to basic oxygen refinin... | 07/11/1978 |
| 4001012 | Method of producing stainless steel A process for producing stainless steel whereby unrefined molten iron is partially refined by blowing oxygen therethrough to slag the phosphorus; removing the slag therefrom; adding chromium-bearing material to the metal and blowing with oxygen shielded w... | 01/04/1977 |
| 3972708 | Process for avoiding formation of smoke and flames in bottom blown converters This disclosure teaches a process for avoiding formation of smoke and flames in bottom blown converters upon charging of scrap and pig iron, deslagging and casting. Inert gas, preferably nitrogen, is blown into the converter vessel through bottom tuyeres ... | 08/03/1976 |
| 3960547 | Steelmaking process Process for producing refined steel including the provision of molten iron, adding molten steel to said molten iron to provide a molten mix, adding iron bearing material in unmolten form to said mix, and refining the mixture by blowing essentially pure ox... | 06/01/1976 |
