Granted Patent
Utility
US 4,453,977 · App. 06/364,135
Low silver containing dental amalgam alloys
Inventors:
Charles F. Burns, Edward J. Pilcicki
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jun 15, 1982
Inventors
Charles F. Burns
Edward J. Pilcicki
Assignee (at issue)
Pennwalt 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.