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
CA915881A
Inventor
F. Cardy Charles
G. Sampson Keith
C. Stephen Robert
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.)
Evonik LIL Ltd
Original Assignee
Keith G Sampson
Robert C Stephen
Laporte Industries Ltd
Publication date
Application grantedgrantedCritical
Publication of CA915881ApublicationCriticalpatent/CA915881A/en