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.)
Individual
Original Assignee
Individual
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
Application filed by IndividualfiledCriticalIndividual
Priority to ES87638ApriorityCriticalpatent/ES87638A1/en
Publication of ES87638A1publicationCriticalpatent/ES87638A1/en
ES87638A1923-12-121923-12-12
A perfected procedure, and its corresponding apparatus, for the treatment of coal and other mineral substances.
ExpiredES87638A1
(en)