Inventor

OTTO JACK C

3 patents

Patents

3 patents

US4256553AMar 17, 1981

Recovering copper from chalcopyrite concentrate

ENVIROTECH CORP72 citations92

US4290865ASep 22, 1981

Recovering copper from a copper-bearing source

ENVIROTECH CORP10 citations70

US4359376ANov 16, 1982

Recovering copper from a copper-bearing source

ENVIROTECH CORP4 citations59