Granted Patent
Utility
US 6,753,388 · App. 10/621,529
Structurally-modified polymer flocculants
Inventors:
Wesley L. Whipple, Chidambaram Maltesh, Cathy C. Johnson, Ananthasubramanian Sivakumar, Tracey M. Guddendorf, Angela P. Zagala
Patented Case
View Patent ↗
Granted: Jun 22, 2004
Filed: Jul 17, 2003
Inventors
Wesley L. Whipple
Chidambaram Maltesh
Cathy C. Johnson
Ananthasubramanian Sivakumar
Tracey M. Guddendorf
Angela P. Zagala
Assignee (at issue)
Nalco Company 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.