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
CA716996A
Inventor
K. Normand James
Edwin J. Claassen, Jr.
W. Bulls James
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.)
SID RICHARDSON CARBON CO
Original Assignee
SID RICHARDSON CARBON CO
Publication date
Application grantedgrantedCritical
Publication of CA716996ApublicationCriticalpatent/CA716996A/en