Granted Patent
Utility
US 5,904,735 · App. 08/905,581
Detergent compositions containing polyethyleneimines for enhanced stain removal
Inventors:
Eddie N. Gutierrez, Shang-Ren Wu, Uday Shanker Racherla, Robert Vermeer
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Aug 4, 1997
Inventors
Eddie N. Gutierrez
Shang-Ren Wu
Uday Shanker Racherla
Robert Vermeer
Assignee (at issue)
Lever Brothers 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.