Granted Patent
Utility
US 5,449,395 · App. 08/276,549
Apparatus and process for the production of fire-refined blister copper
Inventor:
David B. George
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Jul 18, 1994
Inventor
David B. George
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.