Granted Patent
Utility
US 4,265,296 · App. 06/004,112
Investment casting mold forming apparatus
Inventor:
Richard C. Ostrowski
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Dec 21, 1978
Inventor
Richard C. Ostrowski
Assignee (at issue)
Caterpillar Tractor Co.
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.