Granted Patent
Utility
US 5,356,752 · App. 07/920,848
Compounds with acid-labile protective groups useful in positive-working radiation-sensitive mixtures
Inventors:
Ivan Cabrera, Walter Spiess
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Jul 28, 1992
Inventors
Ivan Cabrera
Walter Spiess
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.