About: http://webisa.webdatacommons.org/240362067

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Catalysts that produce syndiotactic polypropylene or other syndiotactic polyolefins and methods for the preparation of such catalysts are disclosed in U.S. Pat. Nos. 4,892,851 to Ewen et al and U.S. Pat. No. 5,807,800 to Shamshoum et al.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com