Granted Patent
Utility
US 5,474,698 · App. 08/175,714
Urea-based solid alkaline cleaning composition
Inventors:
John J. Rolando, Bernard J. Heile, Kent Brittain
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Dec 30, 1993
Inventors
John J. Rolando
Bernard J. Heile
Kent Brittain
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.