Granted Patent
Utility
US 4,334,925 · App. 06/216,680
Combined carburization and sulfurization/desulfurization of molybdenum-rich matte
Inventors:
Jonathan J. Kim, John F. Elliott, deceased
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Dec 15, 1980
Inventors
Jonathan J. Kim
John F. Elliott, deceased
Assignee (at issue)
Kennecott Holdings Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.