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
CA210,437A
Inventor
Paul J. Natho
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.)
ACF Industries Inc
Original Assignee
ACF Industries Inc
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 US488647Aexternal-prioritypatent/US3893652A/en
Application filed by ACF Industries IncfiledCriticalACF Industries Inc
Application grantedgrantedCritical
Publication of CA1003388ApublicationCriticalpatent/CA1003388A/en