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 GB878729344Aexternal-prioritypatent/GB8729344D0/en
Priority claimed from GB888812135Aexternal-prioritypatent/GB8812135D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP88311283Aexternal-prioritypatent/EP0321118B1/de
Application grantedgrantedCritical
Publication of ATE105424T1publicationCriticalpatent/ATE105424T1/de