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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 6395063 | Method and system for pressure oxidation of sulfide gold ores involving enhanced oxygen-sulfide contact A system and method for recovering gold using pressure oxidation is disclosed. In one embodiment, a feed slurry is introduced into multiple compartments or stages of a multi-stage autoclave. In another embodiment, an agitator pump is disposed in each comp... | 05/28/2002 |
| 6383458 | Biooxidation process for recovery of metal values from sulfur-containing ore materials A process for the recovery of one or more metal values from a metal ore material comprising those of one or more values and a matrix material having a sulfur content wherein the sulfur is present in an oxidation-reduction state of zero or less comprising ... | 05/07/2002 |
| 6210648 | Method for processing refractory auriferous sulfide ores involving preparation of a sulfide concentrate A method is provided for flotation of refractory auriferous sulfide using an oxygen-deficient flotation gas. The method is particularly suited for non-selective flotation of different iron-containing sulfide mineral species. Comminution prior to flotation... | 04/03/2001 |
| 5834294 | Biooxidation process for recovery of metal values from sulfur-containing ore materials A hydrometallurgical process for the recovery of one or more metal values from a metal ore material in the presence of clays and/or fines material said ore material being comprised of one or more metal values and a matrix material having a sulfur content ... | 11/10/1998 |
| 5402991 | Tube connector for heap leach mining, drip tube percolation system, and method for connecting same A tube connector utilized in connecting a drip tube to a header pipe in a heap leach mining percolation system which provides for strength at the normally weak connection between the header pipe and the drip tube. The tube connector includes a housing pro... | 04/04/1995 |
| 5246486 | Biooxidation process for recovery of gold from heaps of low-grade sulfidic and carbonaceous sulfidic ore materials A process for biooxidation of sulfides in a heap of mineral ores by freeing precious metals dispersed or occluded within said ores as pyritic or arsenopyritic sulfides and the like; the process comprises forming particulates from ore particles with an ino... | 09/21/1993 |
| 5244493 | Biometallurgical treatment of precious metal ores having refractory carbon content A method is provided for the recovery of precious metal values, such as gold and silver, from refractory carbonaceous, or carbonaceous-sulfidic ore material. The ore material is inoculated using a specific microbial consortium and then incubated to deacti... | 09/14/1993 |
| 5127942 | Microbial consortium treatment of refractory precious metal ores A method is provided for the recovery of precious metals, such as gold and silver, from refractory carbonaceous sulfidic material. The carbonaceous sulfidic material is ground and placed in heaps or piles or pulped or slurried and bioleached to oxidize th... | 07/07/1992 |
| 5123956 | Process for treating ore having recoverable gold values and including arsenic-, carbon- and sulfur-containing components by roasting in an oxygen-enriched gaseous atmosphere Recovery of a precious metal value from refractory carbonaceous and sulfidic ores, concentrates or tailings which also include arsenic-containing components is improved by roasting the ore or ore concentrate in an oxygen-enriched gaseous atmosphere having... | 06/23/1992 |
