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
CA911734A
Inventor
Laveau Francis
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.)
Elf Union
Original Assignee
Elf Union
Publication date
Application grantedgrantedCritical
Publication of CA911734ApublicationCriticalpatent/CA911734A/en