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- Google Patents
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
CA811443A
Inventor
C. Ross William
Original Assignee
WR Grace and Co
Publication date
Application grantedgrantedCritical
Publication of CA811443ApublicationCriticalpatent/CA811443A/en