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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6684796 | Particulate injection burner A burner has a body portion and a main outlet. Fuel and primary oxidant outlets are arranged upstream of the main outlet and are disposed substantially concentrically about the axis of the burner. A chamber inside the body portion provides a place for the... | 02/03/2004 |
| 4718477 | Apparatus and method for processing reactive metals An apparatus and method is disclosed which is adapted to consolidate and melt reactive metallic materials, and to produce a "first ingot" which is suitable for subsequent evaluation and qualification under existing specifications for such materials in the... | 01/12/1988 |
| 4220843 | Process for melting material A high temperature reactor is fitted with a plasma gun at an anode chamber and is provided with a graphite cathode. The reactor is cooled by means of pipes in the refractory lining of the reactor, and rests on essentially horizontal bearings. The charge t... | 09/02/1980 |
| 4217479 | High temperature reactor A high temperature reactor is fitted with a plasma gun at an anode chamber and is provided with a graphite cathode. The reactor is cooled by means of pipes in the refractory lining of the reactor, and rests on essentially horizontal bearings. The charge t... | 08/12/1980 |
| 4214736 | Arc heater melting system Apparatus for melting metal chips comprising a preheating chamber, a prereducing chamber, and a melting chamber, the latter comprising a metallurgical vessel having a refractory wall with arc heater means mounted on the wall and extending therethrough whi... | 07/29/1980 |
| 4215232 | Production of hydraulic cements and cement-forming materials Material for the production of hydraulic cements or for pozzolanic materials which develop cementatious characteristics after blending with an activator, is treated in an expanded precessive plasma in a plasma reactor of the type in which at least one pla... | 07/29/1980 |
| 4177060 | Reduction of stable oxides In a process for the carbothermal reduction of alumina, carbon and alumina are supplied to a molten reaction bed in a hearth in the floor of a reactor. The reaction bed is supplied with energy by contact with plasma or with plasma effluents. For this purp... | 12/04/1979 |
| 4154972 | Apparatus and procedure for reduction of metal oxides In a plasma reactor for reducing stable oxides, particularly alumina, oxide and carbon in particle form are allowed to descend through an upper plasma zone in which there is a precessive plasma column, into a lower collection zone, which has one or more g... | 05/15/1979 |
| 4102765 | Arc heater production of silicon involving alkali or alkaline-earth metals A process for producing high purity silicon characterized by the employment of an electric arc heater into which a silicon halide is injected together with a metal reductant such as an alkali metal or an alkaline-earth metal which are reacted together by ... | 07/25/1978 |
| 3980467 | Method of operating a batch type annealing furnace using a plasma heat source A method for heat treatment, i.e, annealing or softening, of metal materials in the nature of coiled rod, wire, strip sheet, and the like, utilizes a conventional batch type furnace with a controlled atmosphere heated by an electric arc source, i.e., a pl... | 09/14/1976 |
| 3936586 | Arc furnaces and to methods of treating materials in such furnaces A plasma arc furnace in which an expanded plasma column is generated between at least one orbiting electrode moving in a substantially circular path and a stationary electrode. The orbiting electrode is directed towards the orbital axis so as to generate ... | 02/03/1976 |
| 3932171 | Process for high temperature treatment of materials A continuous electrical discharge arc column is moved bodily through a closed arcuate path. Particulate material is fed into the moving column at an angle such that the particles of the material travel through the column in substantially spiral paths. Aft... | 01/13/1976 |
