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
CA852519A
Inventor
O. Rosaen Nils
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.)
Rosaen Filter Co
Original Assignee
Rosaen Filter Co
Publication date
Application grantedgrantedCritical
Publication of CA852519ApublicationCriticalpatent/CA852519A/en