Granted Patent
Utility
US 4,637,568 · App. 06/760,498
Mandrel for winding flexible metal catalyst core
Inventor:
Richard C. Cornelison
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Jul 30, 1985
Inventor
Richard C. Cornelison
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.