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<http://webisa.webdatacommons.org/206531286>	<http://www.w3.org/ns/prov#value>	", 2002Bp Chemicals LimitedNovel catalyst system suitable for polymerising monomers, for example, olefins, and especially for polymerising ethylene alone to form polyethylene varying from hdpe to lldpeUS6489497Jul 7, 2000Dec 3, 2002E. I. Du Pont De Nemours And CompanyManufacture of ??-olefinsUS6534691Jul 17, 2001Mar 18, 2003E. I. Du Pont De Nemours And CompanyManufacturing process for ??-olefinsUS6" .