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
CA890847A
Inventor
F. Radtke Schrade
A. Lund John
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
Publication date
Application grantedgrantedCritical
Publication of CA890847ApublicationCriticalpatent/CA890847A/en