About: http://webisa.webdatacommons.org/296805033

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	Procedures for forming at least one passageway of governed porosity by leaching from a wall, such as a cellulose wall, a pore former is disclosed in U.S. Pat. Nos. 4,200,098; 4,235,236, 4,309,906 and 4,320,759.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com