1980
Polarized thin-section of Sudbury norite.
The company
Inco Limited was the world’s leading nickel producer, with mines and major processing facilities in Ontario and Manitoba, Canada.
Inco Annual Report 1980, p. 4
That year
In June 1980 Inco announced plans to construct a $21 million cobalt refinery at Port Colborne, Ontario, with annual capacity of two million pounds of high-purity cobalt metal.
Inco Annual Report 1980, p. 10
Source
archive.org/details/Inco1973_1980
Other years 1979