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US Patents

Extraction of Cu(II), Fe(III), Ni(II), Co(II), Cd(II), Zn(II), C

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal

Patent

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Already used for thousands of years

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Bloory idea and bloory practical use

Very broad patent, without practical use

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Patented to preserve knowledge

Defensive patent

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Manufacturing base and used to stop/slow down rivals

Serves only patent trolls

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