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 JP55166526Aexternal-prioritypatent/JPS6056821B2/en
Priority claimed from JP56051655Aexternal-prioritypatent/JPS57167434A/en
Priority claimed from JP56079537Aexternal-prioritypatent/JPS57193569A/en
Application filed by Toray IndustriesfiledCriticalToray Industries
Priority claimed from EP81903221Aexternal-prioritypatent/EP0070903B1/en
Application grantedgrantedCritical
Publication of ATE21708T1publicationCriticalpatent/ATE21708T1/en