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
CA775723A
Inventor
A. Hirsch James
D. Smith 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.)
Johnson Matthey Ltd
Original Assignee
Johnson Matthey and Mallory Ltd
Publication date
Application grantedgrantedCritical
Publication of CA775723ApublicationCriticalpatent/CA775723A/en