Granted Patent
Utility
US 4,772,533 · App. 06/927,776
Positive working naphthoquinone diazide color proofing element with polyvinyl acetate adhesive layer
Inventors:
Stephan J. W. Platzer, Gabor I. Koletar, Richard L. Shadrach
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Nov 5, 1986
Inventors
Stephan J. W. Platzer
Gabor I. Koletar
Richard L. Shadrach
Assignee (at issue)
American Hoechst 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.