Granted Patent
Utility
US 5,739,265 · App. 08/530,847
Fractionation of phenol formaldehyde condensate and photoresist compositions produced therefrom
Inventors:
M. Dalil Rahman, Daniel P. Aubin, Dinesh N. Khanna, Sunit S. Dixit
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Sep 20, 1995
Inventors
M. Dalil Rahman
Daniel P. Aubin
Dinesh N. Khanna
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.