Granted Patent
Utility
US 5,014,763 · App. 07/277,853
Method of making ceramic cores
Inventor:
Gregory R. Frank
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Nov 30, 1988
Inventor
Gregory R. Frank
Assignee (at issue)
HOWMET 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.