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.)
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.)
P T Sub Inc
Original Assignee
WR Grace and Co Conn
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CA175,908Aexternal-prioritypatent/CA1021113A/en
Application filed by WR Grace and Co ConnfiledCriticalWR Grace and Co Conn
Priority to CA274,257ApriorityCriticalpatent/CA1022706A/en
Application grantedgrantedCritical
Publication of CA1022706ApublicationCriticalpatent/CA1022706A/en