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 GB878719694Aexternal-prioritypatent/GB8719694D0/en
Priority claimed from GB878729583Aexternal-prioritypatent/GB8729583D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP88306768Aexternal-prioritypatent/EP0304171B1/en
Application grantedgrantedCritical
Publication of ATE84527T1publicationCriticalpatent/ATE84527T1/en