1903

Discovery of silver in Cobalt, Ontario

1906

M.J. O'Brien (a Renfrew businessman and railway contractor) hires former Canadian Goldfields mine engineer Kirkegaard and Queen's University metallurgist Kirkpatrick to create a process to reduce the ores from Cobalt, Ontario to silver, cobalt, and arsenic.

1907

M.J. O'Brien forms the Deloro Reduction and Mining Company and a new plant begins, using the Kirkpatrick-Kirkegaard process for refining ores.

1909

An oxides building and new arsenic plant are erected at Deloro. Trent River hydroelectric connection made to Deloro plant

Stellite Production (1912-1917)

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