Celebrity Inventors
Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7247211 | Method of manufacture of ultra-low carbon steel A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at ... | 07/24/2007 |
| 7007514 | Vacuum degassing apparatus for molten glass A vacuum degassing apparatus for molten glass includes a vacuum housing which is evacuated to be depressurized therein; a vacuum degassing vessel which is provided in the vacuum housing to vacuum-degas molten glass as the molten glass flows therein; an uprising pipe... | 03/07/2006 |
| 6432164 | Method for refining molten steel and apparatus therefor A method for refining molten steel by immersing the lower opening end of a cylindrical immersion tube equipped with a lance into the molten steel contained in a ladle, controlling the pressure in the cylindrical immersion tube to a prescribed pressure ran... | 08/13/2002 |
| 6190435 | Method of vacuum decarburization/refining of molten steel A method for vacuum decarburization refining of a molten steel includes providing a vacuum tank having a one-legged, straight barrel snorkel as a lower portion of the vacuum tank. The a degree of vacuum in the vacuum tank is regulated at a high carbon con... | 02/20/2001 |
| 6156263 | Molten steel smelting apparatus for producing ultra-low carbon steel A molten steel refining apparatus and a method therefor, in which the carbon component of molten steel can be easily removed, the temperature drop of molten steel can be effectively reduced, and a stable operation is realized. The apparatus for refining m... | 12/05/2000 |
| 5919282 | Process for vacuum refining molten steel and apparatus thereof In a process for vacuum refining a molten steel wherein a refining flux is used, a fuel gas and an oxygen gas are spouted into the outlet of a top-blown lance of a vacuum refining apparatus to form a burner flame below the top-blown lance, and, at the sam... | 07/06/1999 |
| 5868816 | Process for adjusting the composition of a liquid metal such as steel, and plant for its implementation A process for adjusting the composition of a liquid metal, such as steel, is provided wherein liquid metal is sucked up from a start receptacle into a reactor which is at a reduced pressure with respect to the start receptacle. First, the liquid metal is ... | 02/09/1999 |
| 5693120 | Production method for low carbon molten steel using vacuum degassing and decarburization treatment In a vacuum degassing and decarburization treatment, the present invention uses a CO2 gas as a recirculating gas and as a stirring gas without inviting stoppage of decarburization and an increase in the carbon concentration and moreover, withou... | 12/02/1997 |
| 5603749 | Apparatus and method for vacuum treating molten steel An apparatus for vacuum treating molten steel includes a ladle having a sidewall, a substantially circular closed bottom, and an open top. A first gas injector is operably associated with the bottom for introducing a supply of a selected first gas into th... | 02/18/1997 |
| 5571307 | Process and device for blowing oxygen over metal melts The invention relates to a process and a device for blowing oxygen over a metal melt under a vacuum. The oxygen is to be applied over a large surface with a large intermediate phase area while avoiding overcooling in the metal bath by simple, easily maint... | 11/05/1996 |
| 5468280 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace with simultaneous degassing of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 11/21/1995 |
| 5454854 | Method of refining molten metal or molten alloy A method of refining a molten metal or a molten alloy through degassing, wherein a gas is blown into a molten metal or a molten alloy contained within a refining container, while stirring by utilizing an electromagnetic force, to superimpose the blown gas... | 10/03/1995 |
| 5403381 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace with simultaneous degassing of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 04/04/1995 |
| 5395094 | Means of conveying molten metal from one place to another in a metal-melting furnace with simultaneous alloying of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/07/1995 |
| 5395424 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace using intermittent or pulsating insert gas feed A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/07/1995 |
| 5332417 | Method for decarburisation of steel in a vacuum treatment chamber and vacuum treatment chamber for implementing the method Method for decarburisation of steel in a vacuum treatment chamber consisting of an upper part (4) in the shape of a bell, of an intermediate ring (5) and of a lower part (6) in which the bath of metal to be treated (2) is located and which is equipped wit... | 07/26/1994 |
| 5152831 | Method of producing ultra-low-carbon steel A method of producing an ultra-low-carbon steel by using a vacuum degasser on a molten steel has the steps of conducting vacuum decarburization to attain a predetermined level of carbon content, e.g., 25 ppm or below, in the molten steel while progressive... | 10/06/1992 |
| 5011531 | Method and apparatus for degassing molten metal utilizing RH method A method and apparatus for vacuum degassing blows gas into molten metal so as to form a substantially uniformly distributed bubble over the path area defined by an induction pipe. In order to achieve this, discharge nozzles are separated into at least two... | 04/30/1991 |
| 4979983 | Process for vacuum degassing and decarbonization with temperature drop compensating feature A process of degassing and decarbonizing is directed to a process for performing vacuum degassing non-deoxidized or slightly deoxidized molten steel utilizing RH process or DH process. The process includes blowing of oxygen or oxygen containing gas toward... | 12/25/1990 |
| 4810286 | Method for reducing dissolved oxygen and carbon contents in molten steel The carbon and dissolved oxygen contents of molten steel are reduced by a vacuum degassing treatment which may employ oxygen blowing. A determination is made of the idealized trajectory or path reflecting the change in carbon content and dissolved oxygen ... | 03/07/1989 |
| 4612044 | Method of vacuum treating metal melts, and vessel for use in the method In a method of vacuum treating metal melts, especially steel melts, a vacuum syphon vessel (1) is used with its suction pipe (2) dipping into the melt (4) in a ladle (3) so that a portion of the melt is drawn into the vessel (1) and is varied between leve... | 09/16/1986 |
| 4456478 | Method of and apparatus for metallurgically treating molten metals Molten steel, carried in a transport ladle from a converter to a casting stage, is treated in a heating chamber which has two tubes depending from its bottom into the ladle to a depth sufficient to penetrate a slag layer and an intermediate layer atop the... | 06/26/1984 |
| 4378242 | Vacuum purification of liquid metal A bath of liquid steel containing metallic impurities is subjected to vacuum effective to cause emission from the bath surface of the metallic impurities as a bulk flow of rising gases. The surface of the bath is kept substantially free of surface contami... | 03/29/1983 |
| 4358313 | Process for refining molten pig iron and steel Refining of molten pig iron and steel in a converter by oxygen blowing continuously at least four charges in a converter to a carbon content in a range from 0.09 to 0.15% and further subjecting the molten steel to a secondary refining by addition or remov... | 11/09/1982 |
| 4104057 | Method for making low carbon high chromium alloyed steels A low carbon high chromium alloyed steel is made by an underpressure treatment wherein a steel melt with a high chromium and carbon content is supplied with a gaseous decarbonization agent while it is maintained at an underpressure. At the beginning of th... | 08/01/1978 |
| 4071356 | Method for refining a molten steel in vacuum A method for refining a molten steel in vacuum, which comprises blowing a non-oxidizing gas or a non-oxidizing gas together with an oxidizing gas into a bath of the molten steel in a refining vessel of a R-H vacuum degassing apparatus at a position betwee... | 01/31/1978 |
