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
CA218,879A
Inventor
William A Macwilliams
Leonard Bithel
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.)
ALBERTA SULPHATE Ltd
Original Assignee
ALBERTA SULPHATE Ltd
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
Application filed by ALBERTA SULPHATE LtdfiledCriticalALBERTA SULPHATE Ltd
Priority to CA218,879ApriorityCriticalpatent/CA1007563B/en
Application grantedgrantedCritical
Publication of CA1007563BpublicationCriticalpatent/CA1007563B/en