Granted Patent
Utility
US 6,517,677 · App. 10/035,872
Method of improving retention and drainage in a papermaking process using low molecular weight cationic dispersion polymers
Inventors:
Richard P. Cardile, John W. Sparapany, Cathy C. Johnson, Angela P. Zagala
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Jan 4, 2002
Inventors
Richard P. Cardile
John W. Sparapany
Cathy C. Johnson
Angela P. Zagala
Assignee (at issue)
Ondeo Nalco 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.