Granted Patent
Utility
US 5,998,092 · App. 09/085,880
Water soluble negative-working photoresist composition
Inventors:
Iain McCulloch, Anthony J. East, Ming Kang, Richard Keosian, Hyun-Nam Yoon
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: May 27, 1998
Inventors
Iain McCulloch
Anthony J. East
Ming Kang
Richard Keosian
Hyun-Nam Yoon
Assignee (at issue)
CLARIANT INTERNATIONAL LTD
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.