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
CA852111A
Inventor
Johnson William
Watt William
Moreton Roger
Original Assignee
National Research Development Corp UK
Publication date
Application grantedgrantedCritical
Publication of CA852111ApublicationCriticalpatent/CA852111A/en