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.)
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.)
McEvoy Oilfield Equipment Co
Original Assignee
McEvoy Oilfield Equipment Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/611,860external-prioritypatent/US4056272A/en
Priority claimed from CA239,123Aexternal-prioritypatent/CA1034488A/fr
Application filed by McEvoy Oilfield Equipment CofiledCriticalMcEvoy Oilfield Equipment Co
Priority to CA295,811ApriorityCriticalpatent/CA1036068A/fr
Application grantedgrantedCritical
Publication of CA1036068ApublicationCriticalpatent/CA1036068A/fr