Granted Patent
Utility
US 5,340,436 · App. 07/828,496
Demetallizing procedure
Inventor:
D. Gregory Beckett
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Jan 31, 1992
Inventor
D. Gregory Beckett
Assignee (at issue)
Beckett Industries Inc.
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.