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
CA867421A
Inventor
Behling Rolf-Dieter
Oelsner Manfred
Zenke Gunther
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.)
BP PLC
Original Assignee
BP PLC
Publication date
Application grantedgrantedCritical
Publication of CA867421ApublicationCriticalpatent/CA867421A/en