Inventor
NORRGRAN DANIEL A
US4 patents
⚠️ This page may combine multiple inventors who share the name “NORRGRAN DANIEL A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ATLANTIC RICHFIELD CO
3 patentsUS4549959AOct 29, 1985
Process for separating molybdenite from a molybdenite-containing copper sulfide concentrate
ATLANTIC RICHFIELD CO30 citations87
US4597857AJul 1, 1986
Process for producing an upgraded sulfide mineral concentrate from an ore containing sulfide mineral and silicate clay
ATLANTIC RICHFIELD CO8 citations71
US4541993ASep 17, 1985
Process for the sulfatization of non-ferrous metal sulfides
ATLANTIC RICHFIELD CO7 citations70