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.)
Expired
Application number
CA266,602A
Inventor
Kazuo Yamakawa
Masaaki Tokunaga
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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
Priority claimed from JP12625073Aexternal-prioritypatent/JPS5724058B2/ja
Application filed by Hitachi Metals LtdfiledCriticalHitachi Metals Ltd
Priority to CA266,602ApriorityCriticalpatent/CA1013967A/en
Application grantedgrantedCritical
Publication of CA1013967ApublicationCriticalpatent/CA1013967A/en