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
CA681444A
Inventor
B. Northrup Jack
S. Doty Arnold
R. Gaus Arthur
Pipitz Egon
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
Arnold S Doty
Arthur R Gaus
Egon Pipitz
Johnson Matthey and Mallory Ltd
Publication date
Application grantedgrantedCritical
Publication of CA681444ApublicationCriticalpatent/CA681444A/en