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
CA609757A
Inventor
W. Toft Robert
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.)
ENGELHARD INDUSTRIES
Original Assignee
ENGELHARD INDUSTRIES
Publication date
Application grantedgrantedCritical
Publication of CA609757ApublicationCriticalpatent/CA609757A/en