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Individual
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Individual
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Priority to ES13036ApriorityCriticalpatent/ES13036A1/en
Publication of ES13036A1publicationCriticalpatent/ES13036A1/en
ES13036A1892-02-241892-02-24
A new procedure or apparatus for the extraction of gold and silver from alluvial lands and gold and silver-bearing rock.
ExpiredES13036A1
(en)
An improved chemical process for removing zinc from sulphurous gangs and recovering lead, silver, gold and other metals from them and other sulphurous gangs.