Granted Patent
Utility
US 4,970,181 · App. 07/247,541
Process for producing ceramic shapes
Inventor:
Alan Pearson
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Sep 22, 1988
Inventor
Alan Pearson
Assignee (at issue)
Aluminum Company of America
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.