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.)
Sudfeldt & Co
Original Assignee
Sudfeldt & Co
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Filing date
Publication date
Application filed by Sudfeldt & CofiledCriticalSudfeldt & Co
Application grantedgrantedCritical
Publication of FR529191ApublicationCriticalpatent/FR529191A/fr
Perfectionnements au procédé de distillation des schistes huileux, houilles et autres substances carbonées et aux appareils utilisés pour cette distillation