Granted Patent
Utility
US 4,748,838 · App. 07/050,413
Process for making obliquely corrugated thin metal strips
Inventor:
Richard C. Cornelison
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: May 18, 1987
Inventor
Richard C. Cornelison
Assignee (at issue)
W. R. Grace & 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.