Granted Patent
Utility
US 6,355,137 · App. 09/690,933
Repulpable wet strength paper
Inventor:
Ronald R. Staib
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Oct 18, 2000
Inventor
Ronald R. Staib
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.