Granted Patent
Utility
US 6,432,271 · App. 09/977,455
Method of increasing retention and drainage in papermaking using high molecular weight water-soluble anionic or nonionic dispersion polymers
Inventors:
Jane B. Wong Shing, Chidambaram Maltesh, John R. Hurlock
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Oct 15, 2001
Inventors
Jane B. Wong Shing
Chidambaram Maltesh
John R. Hurlock
Assignee (at issue)
Nalco Chemical Company
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.