Granted Patent
Utility
US 5,688,633 · App. 08/711,476
Soft relief photopolymer printing plates for flexographic printing
Inventor:
Douglas R. Leach
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Sep 6, 1996
Inventor
Douglas R. Leach
Assignee (at issue)
MacDermid Imaging Technology, 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.