Granted Patent
Utility
US 5,268,252 · App. 07/863,679
Radiation-sensitive ester and process for its preparation
Inventors:
Siegfried Scheler, Wolfgang Zahn, Axel Schmitt, Gerhard Buhr
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Apr 1, 1992
Inventors
Siegfried Scheler
Wolfgang Zahn
Axel Schmitt
Gerhard Buhr
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.