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| Number | Title | Issue Date |
| 7364708 | Multi-catalyst injection system The invention is a multi-catalyst injection system. In one embodiment, the system comprises a vessel suitable for storing fluid cracking catalyst and having a separator defining at least two compartments within the vessel. A plenum is defined in the vessel and is fl... | 04/29/2008 |
| 6371331 | Electronic apparatus for dispensing precise small quantities of fluid An apparatus for dispensing a measured quantity of a liquid has a container holding a quantity of liquid to be measured and dispensed and a conduit with an inlet end, an outlet end and a measuring section having a known volume. A sensor determines when th... | 04/16/2002 |
| 4809883 | Sand dispensing assembly A sand dispensing assembly is provided wherein two different sands are held in two bins in a top section. The bins are concentric and generally cylindrical. A middle section of the sand dispensing assembly includes a plurality of inner dispensing tubes at... | 03/07/1989 |
