Granted Patent
Utility
US 5,213,581 · App. 07/898,845
Compositions and methods that introduce variations in color density into cellulosic fabrics, particularly indigo dyed denim
Inventors:
Lynne A. Olson, Patricia M. Stanley
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Jun 15, 1992
Inventors
Lynne A. Olson
Patricia M. Stanley
Assignee (at issue)
ECOLAB 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.