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
CA816623A
Inventor
H. Wendt Paul
F. Latta David
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.)
PACIFIC CLAY PRODUCTS
Original Assignee
PACIFIC CLAY PRODUCTS
Publication date
Application grantedgrantedCritical
Publication of CA816623ApublicationCriticalpatent/CA816623A/en