Granted Patent
Utility
US 5,531,095 · App. 08/182,921
Method and apparatus for determining the mechanical durability of the surface finish of a cooking vessel
Inventor:
Charles J. Hupf
Patented Case
View Patent ↗
Granted: Jul 2, 1996
Filed: Jan 14, 1994
Inventor
Charles J. Hupf
Assignee (at issue)
Regal Ware, Inc.
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.