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.)
Expired
Application number
CA875111A
Inventor
A. Bellinger Arthur
W. Doyle George
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.)
NL Industries Inc
Original Assignee
NL Industries Inc
Publication date
Application grantedgrantedCritical
Publication of CA875111ApublicationCriticalpatent/CA875111A/en