Bizarre Patents
An electrified table cloth for preventing crawling insects from gaining access to the consumer's food or drink.
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 |
| 6475264 | Direct smelting process A process for direct smelting a metalliferous feed material is disclosed. The process includes the steps of partially reducing metalliferous feed material and substantially devolatilising coal in a pre-reduction vessel and producing a partially reduced me... | 11/05/2002 |
| 5830259 | Preventing skull accumulation on a steelmaking lance A self-cleaning lance includes a lance body elongated along a longitudinal axis and having an upper end portion and a lower end portion, the lower end portion being spaced apart from the upper end portion along the longitudinal axis. One or more main nozz... | 11/03/1998 |
| 4752330 | Method for melting and refining metals This invention relates to a lance/burner apparatus and a method for melting and refining metals. Combustion produced from an oxy-fuel or fuel-air-oxygen flame is used to preheat and melt scrap. Oxygen is introduced through a lance pipe into the molten scr... | 06/21/1988 |
| 4614540 | Process for the removal of contaminating elements from pig-iron, steel, other metals and metal alloys The invention relates to a process for the removal of contaminating chemical elements from pig-iron, steel and other metals and metal alloys in course of the refining process with oxygen blast, as well as for accelerating hydrometallurgical processes. The... | 09/30/1986 |
| 4401466 | Process for protection of nozzles and refractory lining of a vessel for refining molten metal A process for protecting oxygen injection nozzles and the surrounding refractory lining of a molten metal refining vessel having such oxygen injection nozzles beneath the bath surface. The injection nozzle comprises at least three concentric pipes, the ce... | 08/30/1983 |
| 4347079 | Method of operating an open-hearth furnace Oxygen is blown into an open hearth furnace beneath the surface of the molten metal through a jacketed tuyere, each tuyere angled toward the center of the furnace. A high volume of jacketing coolant is injected through two separate annular passageways aro... | 08/31/1982 |
| 4007035 | Method of using an expendable tap hole tuyere in open hearth decarburization A process of making steel in an open hearth furnace utilizing an expendable tuyere inserted within the furnace tap-hole for injecting oxygen into the furnace charge to assist in oxidizing impurities from said charge.... | 02/08/1977 |
| 3950161 | Process for increasing the life of basic refractory linings in hearth-type furnaces An increase in the life of basic refractory linings in hearth type refining furnaces and a decrease in tap-to-tap time is achieved by the use of at least one refining tuyere which consists of two concentric pipes. The central pipe feeds oxygen into the me... | 04/13/1976 |
| 3945820 | Process and immersion lances for introducing oxygen into a metal melt Immersion lances for refining metal melts in hearth type vessels including open hearth and electric furnaces. The lances are movable into and out of the metal melt and comprise an oxygen pipe, a cooling medium pipe surrounding the oxygen pipe and a refrac... | 03/23/1976 |
