Granted Patent
Utility
US 5,439,020 · App. 08/249,961
Detergent mixing apparatus and method
Inventor:
Barton Lockhart
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: May 27, 1994
Inventor
Barton Lockhart
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.