Granted Patent
Utility
US 4,233,256 · App. 05/970,702
Process for injection molding sinterable carbide ceramic materials
Inventor:
Roger W. Ohnsorg
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: Dec 18, 1978
Inventor
Roger W. Ohnsorg
Assignee (at issue)
Carborundum 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.