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 JP55154394Aexternal-prioritypatent/JPS5777651A/en
Priority claimed from JP56064371Aexternal-prioritypatent/JPS57179141A/en
Application filed by Takeda Chemical Industries, Ltd.filedCriticalTakeda Chemical Industries, Ltd.
Priority claimed from EP81304940Aexternal-prioritypatent/EP0051391B1/en
Application grantedgrantedCritical
Publication of ATE9220T1publicationCriticalpatent/ATE9220T1/en