Granted Patent
Utility
US 4,806,452 · App. 07/000,425
Production of flexographic relief plates by photopolymerization and development with a monoterpene developer
Inventors:
Gerhard Hoffmann, Karl-Rudolf Kurtz
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jan 5, 1987
Inventors
Gerhard Hoffmann
Karl-Rudolf Kurtz
Assignee (at issue)
BASF SE
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.