Granted Patent
Utility
US 4,792,538 · App. 07/103,114
Spall resistant chrome-alumina refractory brick
Inventors:
Stanley R. Pavlica, Dwight S. Whittemore
Patented Case
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Granted: Dec 20, 1988
Filed: Sep 30, 1987
Inventors
Stanley R. Pavlica
Dwight S. Whittemore
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.