Granted Patent
Utility
US 5,746,888 · App. 08/677,181
Methods for inhibiting organic contaminant deposition in pulp and papermaking systems
Inventors:
Duy T. Nguyen, Tien-Feng Ling
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Jul 9, 1996
Inventors
Duy T. Nguyen
Tien-Feng Ling
Assignee (at issue)
Betzdearborn, Inc.
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.