<http://webisa.webdatacommons.org/262538332> <http://www.w3.org/ns/prov#wasQuotedFrom> <freepatentsonline.com> . <http://webisa.webdatacommons.org/262538332> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/104578974> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/262538332> . <http://webisa.webdatacommons.org/prov/59832145> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/262538332> . <http://webisa.webdatacommons.org/262538332> <http://www.w3.org/ns/prov#value> "The high-density layer 14 is made of a material, such as polyvinyl chloride or synthetic rubber, which is mixed with a filler." .