Granted Patent
Utility
US 6,143,800 · App. 09/016,180
Compositions and method for inhibiting organic contaminant deposition in pulp and papermaking systems
Inventors:
Duy T. Nguyen, J. Barry Wright, Daniel L. Michalopoulos
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jan 30, 1998
Inventors
Duy T. Nguyen
J. Barry Wright
Daniel L. Michalopoulos
Assignee (at issue)
HERCULES 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.