Granted Patent
Utility
US 5,066,567 · App. 07/500,201
Image reversal process utilizing a positive-working photosensitive composition containing a dye
Inventors:
Hans-Joachim Merrem, Gerhard Buhr, Ruediger Lenz
Patented Case
View Patent ↗
Granted: Nov 19, 1991
Filed: Mar 28, 1990
Inventors
Hans-Joachim Merrem
Gerhard Buhr
Ruediger Lenz
Assignee (at issue)
Hoechst GmbH
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.