Granted Patent
Utility
US 4,536,367 · App. 06/559,999
Method for sanitizing toilets
Inventors:
William M. Hung, Patrick J. Jefferies
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Dec 9, 1983
Inventors
William M. Hung
Patrick J. Jefferies
Assignee (at issue)
Hilton Davis Chemical Co.
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.