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
CA689914A
Inventor
W. Martin Samuel
Frederick L. Shea, Jr.
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.)
SGL Carbon Corp
Original Assignee
Great Lakes Carbon Corp
Publication date
Application grantedgrantedCritical
Publication of CA689914ApublicationCriticalpatent/CA689914A/en