Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 6110377 | Process for recovering the sodium contained in industrial alkaline waste The invention concerns a process that uses an ion exchanger resin to recover the sodium contained in industrial alkaline waste and, in particular, in the "red mud" and sodium effluents coming from the manufacture of aluminum hydrate according to the Bayer... | 08/29/2000 |
| 6065867 | Method and device for measuring the temperature and the level of the molten electrolysis bath in cells for aluminum production A method for measuring temperature and electrolyte level of a molten electrolysis bath in a cell for production of aluminum by electrolysis of alumina includes the steps of: (a) piercing the crust of a solidified bath with a crust breaker and immersing in... | 05/23/2000 |
| 6060013 | Rotary gas dispersion device for treating a liquid aluminium bath A rotary gas dispersion device for use in a liquid aluminium treatment vessel is disclosed. The device is useful for reducing surface disturbance, splashing and vortices while maintaining the effectiveness of the treatment. Said device includes a rotor (1... | 05/09/2000 |
| 6033550 | Process for controlling the alumina content of the bath in electrolysis cells for aluminum production A process for control of the alumina content of the bath in a cell for production of aluminum by electrolysis of alumina dissolved in a molten cryolite-base salt, consisting of alternation of phases of alumina underfeeding and phases of alumina overfeedin... | 03/07/2000 |
| 5980660 | Metal alloy mass for forming in the semisolid state A metal alloy mass of a defined porosity for forming in the semi-solid state. When the porosity is measured by cooling in ambient air from a temperature corresponding to a liquid fraction ratio between 30 and 70% to the ambient temperature, the mass has a... | 11/09/1999 |
| 5961812 | Process and gaseous effluent-collection device for changing spent anodes of pots for electrolysis of aluminum A process for changing spent anodes while recovering the majority of the gaseous compounds evolved by the spent anodes and by the bath crust removed from the electrolytic pots during the cooling phase uses an effluent-collection device for electrolytic po... | 10/05/1999 |
| 5955673 | Cathode sputtering targets selected by ultrasonic inspection for their low level of particle emission A process using ultrasonic inspection for testing the internal soundness of cathode sputtering targets, whose active part is made of aluminum with a very high degree of purity or a very pure aluminum alloy, consisting, after selection of an ultrasound sen... | 09/21/1999 |
| 5947888 | Process for insolubilizing and consolidating spent linings from hall-heroult electrolysis cells Process for insolubilizing and consolidating in pellet form the spent linings from electrolysis cells for the production of aluminium comprising grinding said spent linings and mixing them thoroughly with various pulverulent refractory additives before he... | 09/07/1999 |
| 5916536 | Production of calcined alumina with a crystallite size which can be regulated with a narrow dispersion The invention concerns a process for the production of alumina for ceramics by calcining alumina trihydrate in the presence of a mineralizer such as a halogenated compound and/or a boron compound, the calcined alumina being constituted by friable agglomer... | 06/29/1999 |
| 5888461 | Process for purifying sodium aluminate solutions containing sodium oxalate Process of sodium oxalate purification of sodium aluminate solutions resulting from alkaline attack of bauxites according to the Bayer process, comprising: precipitation of said sodium oxalate in at least a fraction of the pre-decomposed sodium aluminate ... | 03/30/1999 |
| 5882499 | Process for regulating the temperature of the bath of an electrolytic pot for the production of aluminium The process according to the invention solves the problem of the individual thermal regulation of electrolytic pots. It involves acting on the temperature of the pot by means of the setpoint resistance Ro which is modulated so as to correct the temperatur... | 03/16/1999 |
| 5879478 | Process for semi-solid forming of thixotropic aluminum-silicon-copper alloy The invention relates to an aluminum alloy for thixoforming with the composition (by weight): Si: 5%-7.2% Cu: 1%-5% Mg | 03/09/1999 |
| 5851677 | Coating composition for carbon-containing products and said coating Composition for a coating protecting the surfaces of carbon-containing products exposed to a hot, oxidizing environment such as the parts of anodes not immersed in the molten salt bath and the liners of the aluminum electrolysis cells and more generally t... | 12/22/1998 |
| 5779970 | Convection cooking oven with a cooled interior The invention concerns a baking ring furnace characterized by the fact that the two parallel rows of cooking chambers are separated by a unique central wall or interior film or space which is capable of being specifically cooled and made firmly attached t... | 07/14/1998 |
| 5653947 | Method of treating alumina trihydrate containing bauxite of low reactive silica content to form supersaturated sodium aluminate liquor The present invention is a method for producing alumina trihydrate with a low silica content from Gibbsite-containing bauxite of low reactive silica content. The present method involves two desilication steps: one step before extraction of alumina from th... | 08/05/1997 |
| 5643434 | Process for coating the face of a part made of aluminum or aluminum alloy Process for the electrolytic deposition of composite nickel onto the face of a part of a motor vehicle, in particular the bore of a casing or engine block of an internal combustion engine comprising at least three successive stages, the first being an ele... | 07/01/1997 |
| 5630466 | Process for shaping metal materials in a semi-solid state A blank is prepared of a thixotropic metal material and the blank is reheated to a semi-solid state to obtained a liquid fraction corresponding to a desired viscosity for shaping, while determining the power used in the reheating. The reheated blank is tr... | 05/20/1997 |
| 5628972 | Process for removing iron in sodium aluminate liquors obtained from alkaline attack of bauxite containing alumina monohydrate A process for eliminating iron from supersaturated sodium aluminate solutions obtained from the alkaline attack according to the Bayer process of the monohydrate bauxite including successively the steps of grinding and eventually of desilicatation in the ... | 05/13/1997 |
| 5585067 | Aluminum alloys containing very finely dispersed bismuth, cadmium, indium and/or lead and a process for obtaining them An aluminum alloy containing at least one alloying metal selected from the group consisting of bismuth, cadmium, indium and lead in a quantity greater than the maximum solubility of the metal in solid aluminum. More than 80% by weight of the alloying meta... | 12/17/1996 |
| 5573574 | Electrorefined aluminium with a low content of uranium, thorium and rare earths A process for obtaining aluminum of purity above 99.998%. A liquid aluminum raw material is subjected to a fractional crystallization to obtain prepurified aluminum crystals in a yield of between 50 and 80% and a liquid aluminum portion of lesser purity. ... | 11/12/1996 |
| 5476249 | Ladle for the filtration of liquid metal over a filter medium with improved heating Ladle for the filtration of a liquid metal such as aluminum, magnesium, and their alloys over a filter medium of the gravel bed type. The ladle comprises a chamber in which the filter medium rests on a supporting grid, an inlet for supplying liquid metal ... | 12/19/1995 |
| 5431213 | Method for automated injection of gas into an installation for multiple strand casting of metals using the hot top process A method for automated injection of gas into a casting installation including a large number of ingot molds each equipped with a refractory header. Gas introduction slots of particular dimensions are used, with a gas circuit comprising reservoirs R1 and R... | 07/11/1995 |
| 5409054 | Process and plant for automatic casting of semi-finished products In the process, which enables complete automation of casting and limiting the intervention of the operator, the level of metal in the supply runner is monitored, a common law of metal levels is set as a function of time for all ingot molds after individua... | 04/25/1995 |
| 5378338 | Superstructure for a very high power electrolysis cell for the production of aluminum Superstructure for a very high power electrolysis cell for the production of aluminum using the Hall-Heroult process. The cell being formed of a heat-insulated metal casing of elongated parallelepipedic shape. The said superstructure comprising at least o... | 01/03/1995 |
| 5365012 | Process for the heat treatment of spent pot linings derived from Hall-Heroult electrolytic cells A process for heat treating spent pot linings from Hall-Heroult electrolytic cells which comprise carbon and silico-aluminous materials impregnated with fluorides. The pot linings are ground to a particle size less than 5 mm, and formed into an intimate m... | 11/15/1994 |
| 5245116 | Process for the wet treatment of spent pot linings from hall-heroult electrolytic cells A process for the treatment of spent pot linings impregnated with alkali metal cyanide and fluoric products by grinding previously crushed pot linings in the presence of lime, suspending the ground pot linings in an aqueous medium in order to precipitate ... | 09/14/1993 |
| 5245115 | Process for the thermal shock treatment of spent pot linings obtained from Hall-Heroult electrolytic cells The invention relates to a thermal shock treatment in a reactor of ground spent pot linings, constituted both by carbon-containing products and silico-aluminous products impregnated with fluorine-containing mineral compounds, mixed with a pulverulent mine... | 09/14/1993 |
| 5219018 | Method of producing thixotropic metallic products by continuous casting, with polyphase current electromagnetic agitation The invention relates to a continuous casting method for producing thixotropic metallic alloys containing degenerated dendrites. It consists of casting the liquid metal in a movable occluded mould consisting of a hot upstream zone produced from insulating... | 06/15/1993 |
| 5161595 | Process for the lost foam casting, under low pressure, of aluminium alloy articles A pattern of an aluminum alloy article made from a foam of an organic substance. The pattern is immersed in a mold of dry sand containing no binder. The mold is filled with molten aluminum alloy from a feeder zone and the alloy is allowed to solidify, the... | 11/10/1992 |
| 5162093 | Device for opening and closing a vessel containing a metal in the liquid state A device for opening and closing a vessel containing a metal in the liquid state. The device comprises a frustoconical sealing stopper extended by a guide rod, and a means for maneuvering the sealing stopper including two arms of different lengths, which ... | 11/10/1992 |
| 5149502 | Colorimetric apparatus for continuous control of impurities on hydrate of alumina An apparatus for automatic, quantitiative determination of an impurity contained in a product with an uneven upper surface travelling in bulk on a conveyor belt. The apparatus includes a leveling system including a half-cylinder formed of a plastic sheet,... | 09/22/1992 |
| 5094432 | Container for adding light metal to an aluminium alloy in the liquid state A container for adding to a liquid metal of known density and melting point an additive metal of lower density. The container comprises a tube portion of defined cross-section formed of a metal having a melting point higher than the melting point of the l... | 03/10/1992 |
| 5088544 | Process for the lost-foam casting, under controlled pressure, of metal articles An improvement to the process for the lost-foam casting of metal articles. According to the process, the casting takes place under a controlled pressure which initially increases at a rate between 0.003 and 0.3 MPa for a first period of at most 5 seconds ... | 02/18/1992 |
