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.)
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.)
Cities Service Co
Original Assignee
Cities Service Co
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 Cities Service CofiledCriticalCities Service Co
Priority to CA169,393ApriorityCriticalpatent/CA993284A/en
Application grantedgrantedCritical
Publication of CA993284ApublicationCriticalpatent/CA993284A/en