Granted Patent
Utility
US 5,374,693 · App. 07/996,924
Novolak resin blends for photoresist applications
Inventors:
Thomas J. Lynch, Chester J. Sobodacha, Dana L. Durham
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Dec 29, 1992
Inventors
Thomas J. Lynch
Chester J. Sobodacha
Dana L. Durham
Assignee (at issue)
Hoechst Celanese 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.