Granted Patent
Utility
US 6,270,688 · App. 08/224,211
Chemical polishing of barium strontium titanate
Inventors:
James F. Belcher, Howard R. Beratan, Paul Oakley Johnson
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Apr 7, 1994
Inventors
James F. Belcher
Howard R. Beratan
Paul Oakley Johnson
Assignee (at issue)
Raytheon 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.