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
CA780241A
Inventor
A. Deakins Thomas
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.)
United States Pipe and Foundry Co LLC
Original Assignee
United States Pipe and Foundry Co LLC
Publication date
Application grantedgrantedCritical
Publication of CA780241ApublicationCriticalpatent/CA780241A/en