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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8114188 | Method for eliminating carbon contamination of precious metal components In the formation of sheet material from molten glass, molten glass is formed in a melting furnace and transported through a precious metal delivery system to the forming apparatus. Disclosed herein is a method to eliminate carbon-containing contamination of individu... | 02/14/2012 |
| 7309353 | Use of platinum group metals in vascular devices and method of texturing platinum group metals A method of texturing polycrystalline iridium includes the steps of cold/warm working of the polycrystalline iridium at equal to or below its re-crystallization temperature to break up the polycrystalline structure such that the orientation favors one direction (i.e... | 12/18/2007 |
| 7083731 | Precious metal scavenging from a liquid medium with a functionalised polymer fiber A method for the recovery of a metal from a liquid medium containing the metal I solution or in finely divided insoluble from comprises contacting the medium with a functionalized polymer fiber capable of binding the metal and recovering the metal from the fiber. Th... | 08/01/2006 |
| 7066981 | Assaying method The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature... | 06/27/2006 |
| 6663728 | Gold-free platinum material dispersion-strengthened by small, finely dispersed particles of base metal oxide A gold-free platinum material that is dispersion-strengthened by small, finely dispersed particles of base metal oxide. The base metal is either 0.01-0.5 wt. % Sc or a mixture/alloy of Sc and at least one metal from the group consisting of Zr, Y, and Ce w... | 12/16/2003 |
| 6626978 | Method for dressing materials A material benefication process and device for dressing a material comprising noble metals including platinum group metals. The device includes a reactor vessel with an inlet and an outlet for the processing medium. The material to be processed and a hold... | 09/30/2003 |
| 6555010 | Solution mining process for removing metals from aqueous solution A process is disclosed for obtaining colloid-forming metal particles from an aqueous mine waste solution containing that metal in ionic form. In accordance with this process, an aqueous mine waste solution containing that metal in ionic form is provided h... | 04/29/2003 |
| 6428602 | Method for recovering platinum from platinum-containing coatings on gas turbine engine components A method for recovering Pt from Pt-bearing coating on a gas turbine engine component. The component is contacted with a chemical stripping agent to dissolve away constituents of the coating and produce a Pt-bearing film of acid oxidation products at the s... | 08/06/2002 |
| 5797977 | Method of platinum recovery A neutralizing reagent is added to a solution of chloroplatinic acid containing impurities to adjust the pH value of the solution to 5.5-7.0, the insoluble impurity compounds that precipitated in this first neutralization step is filtrated off, a neutrali... | 08/25/1998 |
| 5279644 | Fire refining precious metals asay method A new environmentally safe fire refining precious metal assay method is provided wherein bismuth oxide is used with a special flux composition as the precious metal collector and the cupelling procedure is performed in a controlled temperature range.... | 01/18/1994 |
| 5238662 | Processes for recovering precious metals Disclosed is a process for recovering precious metals using a combination of smelting and an effective utilization of molten salt chlorination. More specifically, disclosed is a process including the steps of (i) contacting, for example, a matte with a ch... | 08/24/1993 |
| 5238485 | Method for the assay and recovery of precious metals Complex ores of the precious metals which also contain iron spinels and similar compounds are assayed and their precious metals content is extracted by subjecting the ores or concentrates thereof together with an iron-embrittling agent to a pyrometallurgi... | 08/24/1993 |
| 5102632 | Two-step method for recovering dispersed noble metals A two-stage method of recovering the noble metal content of a mixture of noble metals, for example, platinum, palladium, and rhodium, this mixture being, for example, comprises on or throughout a pellet or on or throughout a ceramic monolith of a spent ca... | 04/07/1992 |
| 5084092 | Method of separating metals from catalyst material A method of separating metals from carbon-supported catalyst materials comprises the steps of combusting the carbon at a temperature insufficient to cause volatisation of the metal followed by reduction with hydrogen of any oxidised metal and washing with... | 01/28/1992 |
| 5076839 | Precious metal refining with fluorine gas Feed mixtures containing one or more platinum group metals are fluorinated to form at least one volatile fluoride product which is separated from the residual solid. Separations of different fluorides may be effected by collecting different fractions of v... | 12/31/1991 |
| 5074910 | Process for recovering precious metals from sulfide ores The present invention is a process to recover precious metals from sulfide ores. It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt. The salt preferably contains potassium chloride. This chlorination is carried out at ... | 12/24/1991 |
| 4613365 | Method for recovering precious metals The invention relates to a method for pyrometallurgically recovering the precious metal content, such as gold, silver and platinum metals, of halogen-bearing materials rich in silver. The material is caused to rapidly disperse in or be finely distributed ... | 09/23/1986 |
| 4608083 | Method for recovering the valuable metal content of contaminated copper raw material The invention relates to a method for recovering the valuable metal content of a mix of contaminated copper raw materials, of which materials at least one is sulphide bearing, and which contain one or more impurities forming the group arsenic, antimony, b... | 08/26/1986 |
| 4581064 | Treatment of anode slimes in a top blown rotary converter A process for treating anode slimes originating from copper, lead or nickel electrorefining to recover the precious metals contained therein is disclosed. The process comprises the steps of charging the slimes into a tiltable and rotatable top blown rotar... | 04/08/1986 |
| 4526614 | Method for recovering platinum in a nitric acid plant Improved recovery of platinum lost from the catalyst gauze in a nitric acid plant is obtained by using palladium containing recovery gauzes configured to enhance the mass transfer characteristics of the system.... | 07/02/1985 |
| 4451290 | Recovery of platinum group metals from scrap and residues A process for the recovery of platinum group metals, Ag and Au from a precious metal containing residue which includes the platinum group metals, Ag and Au together with Fe, Cu, Ni, Se and Te, the process comprising the following steps: (a) smelting the p... | 05/29/1984 |
| 4448604 | Recovery of precious metals from leach residues This invention relates to the recovery of platinum group metals and Au and Ag from high sulphur content base metal sulphide ore residues and also to the separation of Ag from the other precious metals referred to. The process for the recovery of platinum group... | 05/15/1984 |
| 4416692 | Process for extracting gold, silver, platinum, lead, or manganese metals from ore A process for extracting metals having lead affinity from mineral ores. The process is in steps including, pulverizing the ore material, drying the ore, melting elemental lead in a melting chamber and maintaining the molten lead within a preselected tempe... | 11/22/1983 |
| 4135923 | Extraction of metals This invention relates to the extraction of metals. More particularly, the invention is concerned with the extraction of one or more precious metals from material containing such metals. By "precious metals", both here and throughout the remainder of this... | 01/23/1979 |
