4. C - Chemistry, Metallurgy
  5. 22
  6. B

Extraction of zinc

C - Chemistry – Metallurgy – 22 – B

Patent

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53/328

C22B 3/08 (2006.01)

Patent

CA 210189

Arthur Lionel Mccallum

C - Chemistry – Metallurgy – 22 – B
Inventor

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Frederick Eric Lee

C - Chemistry – Metallurgy – 25 – C
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Selwyn Gwillym Blaylock

C - Chemistry – Metallurgy – 22 – B
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Na

G - Physics – 21 – G
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The Consolidated Mining And Smelting Co. Of Canada

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