Granted Patent
Utility
US 5,186,796 · App. 07/745,276
Method and apparatus for electrolytic etching of metals
Inventors:
John H. Kelly, Leonard E. Guest
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Aug 14, 1991
Inventors
John H. Kelly
Leonard E. Guest
Assignee (at issue)
Stelco 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.