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.)
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.)
Tohto Kasei Co Ltd
Original Assignee
Tohto Kasei Co 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
Application filed by Tohto Kasei Co LtdfiledCriticalTohto Kasei Co Ltd
Priority claimed from EP89304668Aexternal-prioritypatent/EP0400225B1/en
Publication of DE68920734D1publicationCriticalpatent/DE68920734D1/en
Application grantedgrantedCritical
Publication of DE68920734T2publicationCriticalpatent/DE68920734T2/en