Granted Patent
Utility
US 5,111,871 · App. 07/607,847
Method of vacuum casting
Inventor:
Arnold J. Cook
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Nov 1, 1990
Inventor
Arnold J. Cook
Assignee (at issue)
PCast Equipment 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.