Granted Patent
Utility
US 5,338,475 · App. 07/745,782
Carpet cleaning composition with bleach
Inventors:
Garland P. Corey, Elmer M. King, Ralph Edward Rypkema
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Aug 16, 1991
Inventors
Garland P. Corey
Elmer M. King
Ralph Edward Rypkema
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.