Granted Patent
Utility
US 6,498,136 · App. 09/274,977
Polymer having a hydrophilic backbone and hydrophobic moieties as soil suspending agent in powder detergents
Inventor:
Klein A. Rodrigues
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Mar 23, 1999
Inventor
Klein A. Rodrigues
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.