Granted Patent
Utility
US 5,057,372 · App. 07/326,931
Multilayer film and laminate for use in producing printed circuit boards
Inventors:
Stephen M. Imfeld, Randall S. Shipley
Patented Case
View Patent ↗
Granted: Oct 15, 1991
Filed: Mar 22, 1989
Inventors
Stephen M. Imfeld
Randall S. Shipley
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.