Granted Patent
Utility
US 5,536,363 · App. 08/421,349
Methods for inhibiting the deposition of organic contaminants in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatin
Inventor:
Duy T. Nguyen
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Apr 12, 1995
Inventor
Duy T. Nguyen
Assignee (at issue)
Betz PaperChem 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.