Granted Patent
Utility
US 5,518,556 · App. 08/212,996
Surface-hardened objects of alloys of platinum and palladium and method for their production
Inventors:
Wolfgang Weber, Klaus Zimmermann, Hans-Hermann Beyer
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Mar 15, 1994
Inventors
Wolfgang Weber
Klaus Zimmermann
Hans-Hermann Beyer
Assignee (at issue)
Degussa AG
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.