Granted Patent
Utility
US 5,591,485 · App. 08/422,402
Method and apparatus for producing nickel shell molds
Inventors:
Reinhart Weber, Robert Sheppard
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Apr 14, 1995
Inventors
Reinhart Weber
Robert Sheppard
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.