Granted Patent
Utility
US 5,763,376 · App. 08/474,115
Lavatory cleaning block
Inventors:
Kenneth Ward, Richard Dolan, Paul Riccobono
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Jun 7, 1995
Inventors
Kenneth Ward
Richard Dolan
Paul Riccobono
Assignee (at issue)
BLOCK DRUG COMPANY 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.