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
CA682013A
Inventor
E. L. Hughes Kenneth
Plodowski Ryszard
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
Publication date
Application grantedgrantedCritical
Publication of CA682013ApublicationCriticalpatent/CA682013A/en