Granted Patent
Utility
US 6,590,051 · App. 09/767,180
High molecular weight zwitterionic polymers
Inventors:
Phillip W. Carter, Patrick G. Murray, Larry E. Brammer, Jr., Andrew J. Dunham
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Jan 22, 2001
Inventors
Phillip W. Carter
Patrick G. Murray
Larry E. Brammer, Jr.
Andrew J. Dunham
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.