Granted Patent
Utility
US 5,310,430 · App. 07/708,510
Process of dispensing a solid cast block of water soluble detergent
Inventor:
John E. McCall, Jr.
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: May 31, 1991
Inventor
John E. McCall, Jr.
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.