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
CA110444A
Inventor
Wiemer Erich
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.)
Heinrich Koppers GmbH
Original Assignee
Heinrich Koppers GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heinrich Koppers GmbHfiledCriticalHeinrich Koppers GmbH
Priority to CA110444ApriorityCriticalpatent/CA929889A/en
Application grantedgrantedCritical
Publication of CA929889ApublicationCriticalpatent/CA929889A/en