Granted Patent
Utility
US 4,454,239 · App. 06/497,994
Carbonaceous refractory composition for pressing brick shapes
Inventor:
Nicholas Cassens, Jr.
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: May 25, 1983
Inventor
Nicholas Cassens, Jr.
Assignee (at issue)
Kaiser Aluminum & Chemical Corporation
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.