Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Porous Media CorpfiledCriticalPorous Media Corp
Priority claimed from EP92920066Aexternal-prioritypatent/EP0613394B1/de
Application grantedgrantedCritical
Publication of ATE168031T1publicationCriticalpatent/ATE168031T1/de