Granted Patent
Utility
US 5,951,784 · App. 08/878,828
Concrete cleaner and method for cleaning concrete
Inventor:
Charles L. Hawes
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Jun 19, 1997
Inventor
Charles L. Hawes
Assignee (at issue)
Armor All Products Corporation
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.