Granted Patent
Utility
US 6,537,663 · App. 09/565,623
Ion-sensitive hard water dispersible polymers and applications therefor
Inventors:
Yihua Chang, Dave Allen Soerens, Frederick J. Lang
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: May 4, 2000
Inventors
Yihua Chang
Dave Allen Soerens
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.