Kapiton Ushkov
Kapiton Yakovlevich Ushkov () (1813–1868) was a Russian serf who became a major chemical industrialist in Tartarstan. He was born in Bonduga, a village near Yelabuga, in Tartarstan. Bonduga was subsequently renamed Mendeleyevsk. Ushkov discovered that the raw materials for potassium bichromate, a chemical used in the dying process was to be found locally, and so he established a plant for its production in the village of Kokshan. His family included Peter Ushkov (1840–1898) and Konstantin K. Ushkov (1850–1918).