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
CA767061A
Inventor
I. Beyer George
R. Paxton Ralph
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.)
Pure Carbon Co Inc
Original Assignee
Pure Carbon Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA767061ApublicationCriticalpatent/CA767061A/en