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
Inventor
J. Pateman James
D. Street Alfred
R. Fehling Hans
H. Harvey Edward
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.)
IRC Ltd
Original Assignee
IRC Ltd
Publication date
Application grantedgrantedCritical
Publication of CA724940ApublicationCriticalpatent/CA724940A/en