Granted Patent
Utility
US 5,952,394 · App. 08/932,136
Compositions and methods for inhibiting the deposition of organic contaminants in pulp and papermaking systems
Inventor:
Duy T. Nguyen
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Sep 16, 1997
Inventor
Duy T. Nguyen
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.