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 GB868600259Aexternal-prioritypatent/GB8600259D0/en
Priority claimed from GB868620698Aexternal-prioritypatent/GB8620698D0/en
Application filed by Gallaher LtdfiledCriticalGallaher Ltd
Priority claimed from EP86310177Aexternal-prioritypatent/EP0231664B1/de
Application grantedgrantedCritical
Publication of ATE69541T1publicationCriticalpatent/ATE69541T1/de