Granted Patent
Utility
US 4,997,450 · App. 07/321,969
Decolorizing dyed fabric or garments
Inventors:
Lynne A. Olson, Elizabeth J. Gladfelter, Wendell D. Burch
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Mar 10, 1989
Inventors
Lynne A. Olson
Elizabeth J. Gladfelter
Wendell D. Burch
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.