Granted Patent
Utility
US 6,121,412 · App. 09/418,239
Preparation of fractionated novolak resins by a novel extraction technique
Inventors:
Stanley F. Wanat, M. Dalil Rahman, John J. Kokoszka, Balaji Narasimhan
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Oct 14, 1999
Inventors
Stanley F. Wanat
M. Dalil Rahman
John J. Kokoszka
Balaji Narasimhan
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.