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 Billiton Sa LtdfiledCriticalBilliton Sa Ltd
Priority to ZA9904634ApriorityCriticalpatent/ZA994634B/en
Publication of ZA994634BpublicationCriticalpatent/ZA994634B/en