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
CA763990A
Inventor
Blake Stephen
F. E. Keenan 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.)
US Filter Wallace and Tiernan Inc
Original Assignee
Wallace and Tiernan Inc
Publication date
Application grantedgrantedCritical
Publication of CA763990ApublicationCriticalpatent/CA763990A/en