Granted Patent
Utility
US 4,927,732 · App. 07/260,307
Positive-working photosensitive composition containing a dye and positive-working photosensitive recording material prepared therefrom
Inventors:
Hans-Joachim Merrem, Gerhard Buhr, Ruediger Lenz
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Oct 20, 1988
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.