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.)
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Priority to JP50096374ApriorityCriticalpatent/JPS5221374A/ja
Priority to CA257,957Aprioritypatent/CA1061273A/en
Publication of JPS5221374ApublicationCriticalpatent/JPS5221374A/ja
Priority to US05/852,284prioritypatent/US4171739A/en
Publication of JPS5414181B2publicationCriticalpatent/JPS5414181B2/ja