Granted Patent
Utility
US 4,886,731 · App. 07/351,262
Multilayer photopolymeric printing plates with photoreactive diazo compounds and photopolymerizable compositions
Inventors:
Maria T. Sypek, Thomas P. Rorke
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: May 10, 1989
Inventors
Maria T. Sypek
Thomas P. Rorke
Assignee (at issue)
Cookson Graphics 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.