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.)
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Publication date
Priority claimed from NO791158Aexternal-prioritypatent/NO143058C/en
Application filed by Elkem AsfiledCriticalElkem As
Priority to NO800787ApriorityCriticalpatent/NO145190C/en
Publication of NO800787LpublicationCriticalpatent/NO800787L/en
Publication of NO145190BpublicationCriticalpatent/NO145190B/en
Publication of NO145190CpublicationCriticalpatent/NO145190C/en