Granted Patent
Utility
US 4,269,799 · App. 06/108,619
Method of forming fusion cast refractories
Inventor:
Dale L. Rockwell
Patented Case
View Patent ↗
Granted: May 26, 1981
Filed: Dec 31, 1979
Inventor
Dale L. Rockwell
Assignee (at issue)
Combustion Engineering, 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.