Granted Patent
Utility
US 5,110,494 · App. 07/573,650
Alkaline cleaner and process for reducing stain on aluminum surfaces
Inventor:
Leslie M. Beck
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Aug 24, 1990
Inventor
Leslie M. Beck
Assignee (at issue)
Man-Gill Chemical Company
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.