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
CA622096A
Inventor
H. Appel Gerhard
Original Assignee
Appel Process Ltd
Publication date
Application grantedgrantedCritical
Publication of CA622096ApublicationCriticalpatent/CA622096A/en