Granted Patent
Utility
US 4,417,925 · App. 06/368,798
Ceramic fiber refractory mixture
Inventor:
Carl J. Cherry
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Apr 16, 1982
Inventor
Carl J. Cherry
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.