Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8057572 | Metal recovery A method is provided for recovering rhenium from a titania-supported, rhenium-containing catalyst by treating the catalyst in the reduced form with an acid in an amount and for a time sufficient to dissolve the rhenium without dissolving the support. ... | 11/15/2011 |
| 7407526 | Food additive The invention concerns an iron powder for fortifying foodstuff. The powder consists of a reduced iron powder having irregularly shaped particles, wherein the iron powder has a ratio AD:PD less than 0.3, wherein AD is the apparent density in g/cm3, and PD ... | 08/05/2008 |
| 7144493 | Process for the electrochemical decomposition of powders and electrolysis cells suitable therefor Process for the electrochemical decomposition of precursors in powder form by introducing a powder batch between two electrodes of an electrolysis cell, electrodes being designed to be liquid-permeable, and the electrolyte flowing through the powder batch perpendicu... | 12/05/2006 |
| 7094370 | Method for the production of metal-carbon composite powders Metal-carbon composite powders and methods for producing metal-carbon composite powders. The powders have a well-controlled microstructure and morphology and preferably have a small average particle size. The method includes forming the particles from an aerosol of ... | 08/22/2006 |
| 6922020 | Electroluminescent lamp module and processing method The present invention is an EL lamp module and a method of producing an EL lamp module. The EL lamp module of the present invention provides both an EL lamp (attachable or printed) and required electrical components for the proper function of the EL lamp in a single... | 07/26/2005 |
| 6733564 | Process for recovery of nickel from spent catalyst The present invention relates to a process for recovery of nickel and alumina from spent catalyst by direct leaching with sulphuric acid in presence of small amount of an additive. The invention is useful for recovery of both nickel and sources of nickel and therefo... | 05/11/2004 |
| 6524366 | Method of forming nanograin tungsten carbide and recycling tungsten carbide Tungsten carbide is formed from a tungsten material which is preferably tungsten carbide scrap. If scrap material is used, this is oxidized and acid leached to remove impurities and any binder material. This is then dissolved in a solution of sodium hydro... | 02/25/2003 |
| 6454832 | Aluminium alloy semi-finished product manufacturing process using recycled raw materials A manufacturing process for an intermediate product made of a predetermined 7000 series alloy having a target content of at least one first anti-recrystallizing element Z1 selected from the group consisting of Zr and Cr. This process enables effective rec... | 09/24/2002 |
| 6293990 | Aluminum alloy semi-finished product manufacturing process using recycled raw materials A manufacturing process for an intermediate product made of a predetermined 7000 series alloy having a target content of at least one first anti-recrystallizing element Z1 selected from the group consisting of Zr and Cr. The product is produced by the ste... | 09/25/2001 |
| 6193780 | Process and apparatus for the recovery of aluminum and energy from used aluminum-plastic packages Process for the recovery of aluminum and energy from used aluminum-plastic packages and oven for implementing such process, which comprises a pretreatment for the recovery of paper, the separation of aluminum and of recyclable products by pyrolysis of pol... | 02/27/2001 |
| 6165248 | Evaluating precious metal content in the processing of scrap materials A method for evaluating a batch of scrap material, subsequent to processing of the batch, to determine the content of precious metal present in the batch prior to processing of the batch, includes introducing a predetermined amount of a tracer into the ba... | 12/26/2000 |
| 6156289 | Iron based roofing granules and method of coloring same Method of preparing colored roofing granules (18) from granulated mineral-containing matter having an elemental iron content of about 15% to about 70% is disclosed. The method comprises heating the granules (18) to a temperature of from about 450° C. to ... | 12/05/2000 |
| 5984997 | Combustion of emulsions: A method and process for producing fine powders A process for producing nanoscale powders, and the powders so produced. The process comprises mixing an emulsion comprising all of the elements of the desired powder composition and a combustible fuel, and then combusting that emulsion to produce a powder... | 11/16/1999 |
| 5976217 | Method for the reduction of metallic compounds The preparation of suitable powdered metal is important in powder metallurgy technology. To date, powdered metals, in particular refractory metals, have been produced using very time-consuming and, consequently, costly methods for the reduction of metalli... | 11/02/1999 |
| 5698759 | Treatment of polyvinylchloride A method is described which allows two hazardous waste products, namely PVC and electric arc furnace dust, both of which have negative commercial value, to be combined to produce an iron oxide suitable for steel making and making pure cadmium lead and zin... | 12/16/1997 |
| 5306328 | Process for the preparation of copper powder Finely divided copper powder suitable for the preparation of copper catalyst for the synthesis of methylchlorosilane is prepared by adding an aqueous copper salt solution to an aqueous suspension of iron powder. Copper salt solutions obtained as process r... | 04/26/1994 |
| 5279641 | Method for concurrent production of copper powder and a metal chloride A novel method is proposed for concurrently producing a metallic copper powder and a valuable chloride of a metal other than copper, e.g., manganese, zinc, cobalt, nickel and tin, from a depleted aqueous etching solution containing copper (II) chloride as... | 01/18/1994 |
| 5221323 | Method of producing magnetic powders from heavy metal sludges A preparation method of magnetic powders by using ferric compounds added to heavy metal sludges, and then heating under an atmosphere control and at adequate temperature so as to convert heavy metal sludges into magnetic ferrite powders. Owing to the obta... | 06/22/1993 |
| 5084253 | Method of removing niobium from uranium-niobium alloy A method of removing niobium from a uranium-niobium alloy includes dissolving the uranium-niobium alloy metal pieces in a first aqueous solution containing an acid selected from a group consisting of HCl and H2 SO4 and a fluoboric ac... | 01/28/1992 |
| 4874429 | Hydrometallurgical process for the recovery of silver from copper electrolysis anode sludge Silver is recovered from an anode sludge by initially chlorinating the sludge in a slurry with nascent chlorine. The nascent chlorine is produced in situ by addition of sodium hypochlorite to the slurry in hydrochloric acid. Then the slurry is filtered an... | 10/17/1989 |
| 4718955 | Method of recovering powered aluminum from aluminum-polymer mixtures Solid composite propellants for rocket motors normally consist of an oxidizer and and aluminum powder cured in a polymeric binder system. The oxidizer, ammonium perchlorate, can be readily removed by suitable solvents leaving a residue consisting primaril... | 01/12/1988 |
| 4718939 | Recycling superalloy scrap by vapor phase zinc embrittlement A method of making superalloy scrap friable in order to allow greater recovery of metal values therein is disclosed whereby the scrap is treated with zinc vapor. After exposure to the zinc vapor, the metal scrap becomes friable so that it can be easily cr... | 01/12/1988 |
| 4615731 | Hydrometallurgical processing of precious metal-containing materials A hydrometallurgical process is provided for separating heavy metal nuisance elements such as As, Sb, Bi, Sn and Pb from precious metals and/or selenium. The process can be used as a step in an overall hydrometallurgical process for treating refinery resi... | 10/07/1986 |
| 4466945 | Method of recovering metal carbides Metal carbide is reclaimed from scrap by sorting the scrap to separate pieces of cemented carbide having similar composition and grain size and treating the separated portion to form metal carbide grains which may be resintered with metal binder to obtain... | 08/21/1984 |
| 4452633 | Method for producing cobalt metal powder In a process for producing fine size cobalt metal powder from scrap material containing brazing compositions, the silver ions are removed by cementation with iron to form an insoluble mixture which is subsequently treated with concentrated hydrochloric ac... | 06/05/1984 |
| 4381937 | Method for producing cobalt metal powder In a process for producing fine cobalt metal powder from scrap material containing brazing compositions, the scrap is digested with hydrochloric acid to form a cobalt chloride solution which the silver is removed by precipitation with a suitable alkali me... | 05/03/1983 |
| 4348224 | Method for producing cobalt metal powder In a process for producing fine size cobalt metal powder from scrap material containing brazing compositions, the scrap is digested with hydrochloric acid to produce an aqueous cobalt acid chloride solution containing copper and silver ions which ions are... | 09/07/1982 |
| 4278463 | Process for recovering cobalt Cobalt is recovered from byproduct streams from a basic process by contacting the byproduct streams with aluminum metal for a sufficient period of time to produce cobalt metal as a precipitate. The basic process is the type wherein cobalt ions in solution... | 07/14/1981 |
| 4229182 | Recovery of aluminum from composite propellants Aluminum is recovered from solid rocket propellant containing a small amount of oxidizer by depolymerizing and dissolving propellant binder containing functional or hydrolyzable groups in a solution of sodium methoxide in an alcohol solvent optionally con... | 10/21/1980 |
| 4190422 | Metallic abrasive produced from a steel mill waste material A method for preparing a steel mill waste material comprised of inner metallic cores encased in outer shells of iron oxides for use as size-graded metallic abrasives and the product so produced are described. The waste material is screened to simultaneously se... | 02/26/1980 |
| 4138249 | Process for recovering valuable metals from superalloy scrap Disclosed is a method for recovering valuable metals from scrap including the steps of melting the initial scrap feed, carburizing the melt, solidifying the carburized melt, and recovering the valuable metals from the resulting material by ammoniacal leac... | 02/06/1979 |
| 4129441 | Recovery of silver from silver containing solutions Silver is precipitated from an aqueous sulphate solution containing dissolved silver and other metals at a temperature between about 60° C. and about 125° C. by hydrogen gas at a partial pressure between about 2 and about 5 kg/cm2.... | 12/12/1978 |
| 3966886 | Method of preparing and isolating metal hydrocarbonyls and recovery of pure metals therefrom This invention comprises a novel method for the preparation of metal hydrocarbonyls of metals of Groups 1b, 2b, 3b, 4b, 5b, 6b, 7b and 8 of the Periodic Table of the Elements and the attendant method for isolation of pure metals by the separation of a sin... | 06/29/1976 |
| 3953194 | Process for reclaiming cemented metal carbide There is disclosed a process for reclaiming cemented metal carbide material by first subjecting the metal carbide material to catastrophic oxidation to produce a mixture of metal oxide and the oxide of the cement, reducing the metal oxide either mixed wit... | 04/27/1976 |
