Granted Patent
Utility
US 4,874,450 · App. 07/220,363
Laminating transparent or translucent materials using ionic dye-counter ion complexes
Inventor:
Peter Gottschalk
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Jul 11, 1988
Inventor
Peter Gottschalk
Assignee (at issue)
The Mead 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.