Granted Patent
Utility
US 5,559,059 · App. 08/447,055
Lead-free glass frits for ceramics enamels
Inventor:
Joseph W. Ryan
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: May 22, 1995
Inventor
Joseph W. Ryan
Assignee (at issue)
Cerdec Corporation
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.