Granted Patent
Utility
US 5,928,836 · App. 08/939,451
Fractionated novolak resin copolymer and photoresist composition therefrom
Inventors:
M. Dalil Rahman, Stanley F. Wanat, Michelle Cook, Douglas McKenzie, Sunit S. Dixit
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Sep 29, 1997
Inventors
M. Dalil Rahman
Stanley F. Wanat
Michelle Cook
Douglas McKenzie
Sunit S. Dixit
Assignee (at issue)
Clariant Finance (BVI) Limited
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.