Granted Patent
Utility
US 6,429,267 · App. 09/224,107
Process to reduce the AOX level of wet strength resins by treatment with base
Inventor:
Richard J. Riehle
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Dec 22, 1998
Inventor
Richard J. Riehle
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.