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
CA690902A
Inventor
Jr. William G. Baird
Jr. Carl A. Lindstrom
Jr. Arthur L. Besse
J. D'entremont Donald
Original Assignee
WR Grace and Co
Publication date
Application grantedgrantedCritical
Publication of CA690902ApublicationCriticalpatent/CA690902A/en