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Individual
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Priority to ES0149457ApriorityCriticalpatent/ES149457A1/en
Publication of ES149457A1publicationCriticalpatent/ES149457A1/en
Mezcla de escorias de carbón o carbonilla arena y cementoen la proporción de 80% y 20% respectivamente.Mix of coal slag or char, sand and cement in the proportion of 80% and 20% respectively.
ES0149457A1942-04-291942-04-29
A NEW PROCEDURE FOR THE MANUFACTURE OF CONSTRUCTION MATERIAL FOR BUILDINGS
ExpiredES149457A1
(en)
Improvements relating tothe manufacture and use of felted materials of asbestos-fibre and tarry or bituminous substances forthe coating of steel, concrete, wood andthe like