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
CA788387A
Inventor
W. Redican Francis
Chi-Sun Yang Julie
J. Gorman Richard
R. Blair Laurence
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.)
Johns Manville Corp
Original Assignee
Johns Manville Corp
Publication date
Application grantedgrantedCritical
Publication of CA788387ApublicationCriticalpatent/CA788387A/en