Inventor
ENGELMANN WILLIAM H
US4 patents
Patents
4 patentsUS4080419AMar 21, 1978
Foam injection leaching process for fragmented ore
US INTERIOR26 citations78
US5196401AMar 23, 1993
Method of enhancing rock fragmentation and extending drill bit life
US INTERIOR17 citations70
US4959164ASep 25, 1990
Rock fragmentation method
US INTERIOR13 citations70
US4765415AAug 23, 1988
Isoelectric drilling method
US INTERIOR16 citations67