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.)
British Gas Corp
Original Assignee
British Gas Corp
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 British Gas CorpfiledCriticalBritish Gas Corp
Priority to CA000342749ApriorityCriticalpatent/CA1122098A/fr
Application grantedgrantedCritical
Publication of CA1122098ApublicationCriticalpatent/CA1122098A/fr