Granted Patent
Utility
US 6,423,804 · App. 09/223,999
Ion-sensitive hard water dispersible polymers and applications therefor
Inventors:
Yihua Chang, Pavneet S. Mumick, Frederick J. Lang
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Dec 31, 1998
Inventors
Yihua Chang
Pavneet S. Mumick
Frederick J. Lang
Assignee (at issue)
Kimberly-Clark Worldwide, Inc.
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.