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Lucien Jumau
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Individual
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Publication of GB190700591ApublicationCriticalpatent/GB190700591A/en
591. Jumau, L. July 11, 1906, [date applied for under Patents Act, 1901]. Copper sulphite.-Improvements in the process of extracting copper from its ores described in Specification No. 414, A.D. 1907, consist in heating under pressure in a closed vessel the cuproso-cupric sulphite obtained in the first step of the process, either in presence of the supernatant liquid or in presence of water. The pure precipitated copper may be treated as described in the prior Specification.
GB190700591D1906-07-111907-01-09Improved Process of Extracting Copper from its Ores.
ExpiredGB190700591A
(en)
Improvements in Apparatus for the Washing of Coal, for the Filtering and Recovery of Fine Coal from the Effluent Water, and for the subsequent Draining or Drying of the Washed Coal.