Granted Patent
Utility
US 6,192,524 · App. 09/338,504
Toilet bowl cleaning and sanitizing composition and system and method of using same
Inventor:
Robert H. Black
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Jun 23, 1999
Inventor
Robert H. Black
Assignee (at issue)
Robert Black
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.