Granted Patent
Utility
US 6,645,389 · App. 10/216,046
Method of demetallizing a web in an etchant bath and web suitable therefor
Inventor:
Laurence M. C. Lai
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Aug 9, 2002
Inventor
Laurence M. C. Lai
Assignee (at issue)
Graphic Packaging 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.