Granted Patent
Utility
US 4,810,409 · App. 07/133,833
Stable, isotropic liquid laundry detergents
Inventors:
Kenneth A. Harrison, Jeanne Marie Weller
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Dec 16, 1987
Inventors
Kenneth A. Harrison
Jeanne Marie Weller
Assignee (at issue)
Sterling Drug, 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.