Granted Patent
Utility
US 4,832,864 · App. 07/096,953
Compositions and methods that introduce variations in color density into cellulosic fabrics, particularly indigo dyed denim
Inventor:
Lynne A. Olson
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Sep 15, 1987
Inventor
Lynne A. Olson
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.