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
CA767594A
Inventor
O. S. Stark Sven
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.)
TETRA AB
Original Assignee
Sven O S Stark
TETRA AB
Publication date
Application grantedgrantedCritical
Publication of CA767594ApublicationCriticalpatent/CA767594A/en