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 GB8406219Aexternal-prioritypatent/GB8406219D0/en
Priority claimed from GB858504564Aexternal-prioritypatent/GB8504564D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP85301375Aexternal-prioritypatent/EP0148793B1/de
Application grantedgrantedCritical
Publication of ATE56626T1publicationCriticalpatent/ATE56626T1/de