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
CA724554A
Inventor
L. Clark Ezekail
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.)
North American Coal Corp
Original Assignee
North American Coal Corp
Publication date
Application grantedgrantedCritical
Publication of CA724554ApublicationCriticalpatent/CA724554A/en