Granted Patent
Utility
US 4,602,771 · App. 06/670,522
Apparatus for casting refractory compositions
Inventors:
Joseph E. Milliron, Alvin W. Barrett, Robert H. Phillips
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Nov 9, 1984
Inventors
Joseph E. Milliron
Alvin W. Barrett
Robert H. Phillips
Assignee (at issue)
Narco Investors, 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.