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.)
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Individual
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Individual
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Priority to ES82531ApriorityCriticalpatent/ES82531A2/es
Publication of ES82531A2publicationCriticalpatent/ES82531A2/es
ES82531A1922-08-091922-08-09Un procedimiento perfeccionado de carbonización de la hulla, por medio de los aparatos correspondientes.
ExpiredES82531A2
(es)