Granted Patent
Utility
US 6,174,492 · App. 09/241,142
Forebay for am Metallurgical furnace
Inventors:
John F. Castle, Philip J. Gabb, David B. George
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Feb 1, 1999
Inventors
John F. Castle
Philip J. Gabb
David B. George
Assignee (at issue)
Kennecott Utah Copper LLC
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.