About: http://webisa.webdatacommons.org/114709827

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	U.S. Pat. Nos. 5,552,469 and 5,578,672 describes the preparation of intercalates derived from certain clays and water-soluble polymers such as polylvinyl pyrrolidone, polyvinyl alcohol, and polyacrylic acid.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com