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.)
NAT LEAD CO
NL Industries Inc
Original Assignee
NAT LEAD CO
NL Industries Inc
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 NAT LEAD CO, NL Industries IncfiledCriticalNAT LEAD CO
Priority to FR958479ApriorityCriticalpatent/FR1385705A/fr
Application grantedgrantedCritical
Publication of FR1385705ApublicationCriticalpatent/FR1385705A/fr