Granted Patent
Utility
US 4,656,146 · App. 06/748,261
Abrasion resistant refractory composition
Inventors:
Paul E. Schlett, John R. Peterson, James A. Caprio, Thomas R. Kleeb
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Jun 24, 1985
Inventors
Paul E. Schlett
John R. Peterson
James A. Caprio
Thomas R. Kleeb
Assignees (at issue)
Exxon Research & Engg.
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.