Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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 |
| 8021461 | Remedial heap treatment A system and method are disclosed for improving component extraction from heap leach operations. Following heap leaching for some time, portions of the heap deficient in component extraction are identified, and treatment wells are drilled and remedial treatments are... | 09/20/2011 |
| 7947108 | Precious metal recovery using thiocyanate lixiviant Mineral materials comprising copper and precious metal are subjected to an acidic leach of the copper followed by an acidic thiocyanate leach of the precious metal. ... | 05/24/2011 |
| 7559973 | Precious metal recovery using thiocyanate lixiviant For removal of precious metal from thiocyanate leach solution, precious metal is transferred from precious metal-thiocyanate complex to precious metal-cyanide complex. Preparation of thiocyanate leach solution includes dissolving cyanide in an aqueous liquid and con... | 07/14/2009 |
| 7537640 | Precious metal recovery using thiocyanate lixiviant A heap with precious metal-containing mineral material with precious metal locked within sulfide mineralization is subjected to bio-oxidation followed by acidic thiocyanate leaching to dissolve precious metal. Sulfide sulfur is oxidized during both of the bio-oxidat... | 05/26/2009 |
| 7514050 | Processing of acid-consuming mineral materials involving treatment with acidic biooxidation effluent In one aspect the present invention provides a method of recovering gold from each of at least two different refractory gold-bearing sulfidic mineral materials. A first mineral material is subjected to biooxidation pretreatment to release gold locked within sulfide ... | 04/07/2009 |
| 7285256 | Precious metal recovery using thiocyanate lixiviant Precious metal-containing mineral material is subjected to an acidic thiocyanate leach to dissolve the precious metal as a precious metal-thiocyanate complex. A feed of the thiocyanate leach solution may include a large molar ratio of ferric iron to thiocyanate. Pre... | 10/23/2007 |
| 7219804 | Flotation processing including recovery of soluble nonferrous base metal values A method of flotation processing ores and other mineral materials containing soluble nonferrous base metal and sulfide minerals involves dissolving the soluble nonferrous base metal and precipitating the soluble nonferrous base metal in the form of a floatable preci... | 05/22/2007 |
| 6696283 | Particulate of sulfur-containing ore materials and heap made therefrom Disclosed is a particulate of an ore material having a metal value metal value and a matrix material having a sulfur content wherein the sulfur is present in an oxidation-reduction state of zero or less, the particulate comprising (a) a core particle of t... | 02/24/2004 |
| 6679383 | Flotation of platinum group metal ore materials Provided is a method involving flotation of a feed of platinum group metal ore material to prepare a platinum group metal concentrate during mineral processing operations. Prior to and/or during the flotation, a lead-containing activator reagent and a xan... | 01/20/2004 |
| 6641642 | High temperature pressure oxidation of ores and ore concentrates containing silver using controlled precipitation of sulfate species A method for the treatment of sulfide ores containing silver by pressure oxidation. The method includes the addition of a sulfate-binding material to reduce the formation of jarosite species during pressure oxidation. Silver can then be recovered from the... | 11/04/2003 |
| 6576041 | Method and apparatus for chemical processing A system and method are disclosed after chemical processing involving agitation and/or mixing of components. In one embodiment, the chemical processing involves pressure oxidation and in another embodiment involves pressure leaching. Agitation during chem... | 06/10/2003 |
| 6500231 | Recovery of precious metals from thiosulfate solutions In one aspect, the present invention provides a method for recovering precious metal, and particularly gold, from a particulate substrate loaded with a precious metal-containing coating, in which a portion, but less than substantially all, of the particul... | 12/31/2002 |
| 6482373 | Process for treating ore having recoverable metal values including arsenic containing components Roasting of ores with metal values such as precious metal ores for recovery of metal values with conversion of arsenic to an insoluble form in-situ in presence of an additive such as iron and in presence of oxygen injected initially or supplementally in a... | 11/19/2002 |
