Granted Patent
Utility
US 5,846,352 · App. 08/754,880
Heat treatment of a platinum-gallium alloy for jewelry
Inventor:
Steven Kretchmer
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Nov 22, 1996
Inventor
Steven Kretchmer
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.