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
CA873190A
Inventor
Viki-Helkala
Koskela Sauli
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.)
Valmet Oy
Original Assignee
Valmet Oy
Publication date
Application grantedgrantedCritical
Publication of CA873190ApublicationCriticalpatent/CA873190A/en