Assignee
NITTETSU MINING COMPANY LTD
2 granted patents·32 citations·filing 1975–1975
Top patents by PatentIndex Score
2 records- 0171US3969484AProcess for recovering tungsten from alkaline leaching solution of tungsten oresNITTETSU MINING COMPANY LTD·Filed 1975·Granted Jul 13, 1976·23 cites·5 claims
- 0246US4040519AFroth flotation process for recovering sheeliteNITTETSU MINING COMPANY LTD·Filed 1975·Granted Aug 9, 1977·9 cites·6 claims
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