Granted Patent
Utility
US 4,900,249 · App. 07/002,325
Aluminum reverberatory furnace lining
Inventors:
John M. McCollum, John N. Snyder
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jan 12, 1987
Inventors
John M. McCollum
John N. Snyder
Assignee (at issue)
Dresser Industries, Inc.
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.