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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
Inventor
George H. Ii Tomlinson
Original Assignee
Dominion Tar and Chemical Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA721960ApublicationCriticalpatent/CA721960A/en