Granted Patent
Utility
US 5,308,387 · App. 07/893,190
Pre-etch treatment of a plastic substrate
Inventor:
Barry S. James
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Jun 3, 1992
Inventor
Barry S. James
Assignee (at issue)
Elf Atochem North America, 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.