Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8097227 | Method for thiosulfate leaching of precious metal-containing materials Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding agents. ... | 01/17/2012 |
| 7192093 | Excavation apparatus and method In one embodiment, an excavation method is provided that includes the steps of: (a) contacting a rotating powered cutting head 440 of an excavator 400 with an excavation face 452, wherein, at any one time, a fi... | 03/20/2007 |
| 7066983 | Method for thiosulfate leaching of precious metal-containing materials Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polyth... | 06/27/2006 |
| 6857706 | Mining method for steeply dipping ore bodies The present invention is directed to a mining method for steeply dipping orebodies. In the method, an excavator 152 is tethered to a deployment system 120 by one or more cables/umbilicals 144. The excavator 152 excavates slices 172... | 02/22/2005 |
| 6660059 | Method for thiosulfate leaching of precious metal-containing materials Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reductio... | 12/09/2003 |
