Granted Patent
Utility
US 6,482,292 · App. 10/164,027
Styrene copolymers in de-inking
Inventors:
Duy T. Nguyen, Charles W. Hengst
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Jun 6, 2002
Inventors
Duy T. Nguyen
Charles W. Hengst
Assignee (at issue)
HUNTSMAN PETROCHEMICAL LLC
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.