Granted Patent
Utility
US 5,628,921 · App. 08/470,016
Demetallizing procedure
Inventor:
D. Gregory Beckett
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Jun 6, 1995
Inventor
D. Gregory Beckett
Assignee (at issue)
Beckett Technologies Corp.
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.