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| Number | Title | Issue Date |
| 7338603 | Process using rare earths to remove oxyanions from aqueous streams Oxyanions of various contaminant elements, such as chromium, antimony, molybdenum, tungsten, vanadium and uranium, are removed from water and other aqueous feeds by treating the feed with (1) a sorbent comprising one or more rare earth compounds, usually mixed or su... | 03/04/2008 |
| 6925924 | Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator A non-linear shaped charge perforator for use in perforating an oil and gas formation into which a wellbore has been drilled comprises a monolithic, axisymmetric metal case in which is disposed a main explosive charge between the front of the case, which is closed w... | 08/09/2005 |
