Granted Patent
Utility
US 4,312,951 · App. 06/073,609
Low-melting, lead-free ceramic frits
Inventor:
Richard A. Eppler
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Sep 7, 1979
Inventor
Richard A. Eppler
Assignee (at issue)
Mobay Chemical 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.