Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hepworth Minerals and Chemicals Ltd
Original Assignee
Hepworth Minerals and Chemicals Ltd
Filing date
Publication date
Priority claimed from GB8714649Aexternal-prioritypatent/GB2206505B/en
Application filed by Hepworth Minerals and Chemicals LtdfiledCriticalHepworth Minerals and Chemicals Ltd
Publication of AU2835989ApublicationCriticalpatent/AU2835989A/en
Publication of AU613443B2publicationCriticalpatent/AU613443B2/en
Application grantedgrantedCritical
Publication of AU613443CpublicationCriticalpatent/AU613443C/en