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Individual
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Individual
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Priority to ES109330ApriorityCriticalpatent/ES109330A1/en
Publication of ES109330A1publicationCriticalpatent/ES109330A1/en
ES109330A1928-09-171928-09-17
Improvements in the treatment of pyrites and other minerals or sulphurous materials containing iron.
ExpiredES109330A1
(en)