Granted Patent
Utility
US 4,888,270 · App. 07/041,239
Photoprinting process and apparatus for exposing paste consistency photopolymers
Inventor:
Donald F. Sullivan
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jun 2, 1987
Inventor
Donald F. Sullivan
Assignee (at issue)
M&T Chemicals, 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.