Solid titanium catalyst component for olefin polymerization, olefin polymerization catalyst, prepolymerized polyolefin-containing catalyst and method of olefin polymerization

Granted: Mar 10, 1998 Filed: Dec 24, 1996

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.