Granted Patent
Utility
US 4,997,795 · App. 07/447,273
Dielectric compositions of devitrified glass containing small amounts of lead oxide and iron oxide
Inventors:
Kenneth Warren Hang, Ashok N. Prabhu, Wayne M. Anderson
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Dec 7, 1989
Inventors
Kenneth Warren Hang
Ashok N. Prabhu
Wayne M. Anderson
Assignee (at issue)
General Electric Company
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.