prov:value
| - Processes may include gas phase fluid bed polymerization of one or more olefin, at least one of which may be ethylene, propylene or other monomers, in the presence of a catalyst (see, for example, U.S. Pat. Nos. 4,543,399, 4,588,790, 5,028,670, 5,317,036, 5,352,749, 5,405,922, 5,436,304, 5,453,471, 5,462,999, 5,616,661 and 5,668,228).
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