Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Lead Zinc Research Organization Inc
Original Assignee
International Lead Zinc Research Organization Inc
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Application filed by International Lead Zinc Research Organization IncfiledCriticalInternational Lead Zinc Research Organization Inc
Priority to FR7236723ApriorityCriticalpatent/FR2202952A1/fr
Publication of FR2202952A1publicationCriticalpatent/FR2202952A1/fr
Application grantedgrantedCritical
Publication of FR2202952B1publicationCriticalpatent/FR2202952B1/fr
