Granted Patent
Utility
US 5,779,858 · App. 08/651,077
Deposition control in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatin
Inventor:
Duy T. Nguyen
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: May 22, 1996
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.