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
CA746842A
Inventor
L. Malobicky Rudolph
J. D. Jursa Stephen
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.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
Publication date
Application grantedgrantedCritical
Publication of CA746842ApublicationCriticalpatent/CA746842A/en