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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
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 FR7327584Aexternal-prioritypatent/FR2238532A1/en
Priority claimed from FR7421826Aexternal-prioritypatent/FR2276092A2/en
Application filed by Charbonnages de France CDFfiledCriticalCharbonnages de France CDF
Application grantedgrantedCritical
Publication of AU7171374ApublicationCriticalpatent/AU7171374A/en
Publication of AU486960B2publicationCriticalpatent/AU486960B2/en