Granted Patent
Utility
US 4,289,644 · App. 06/156,324
Pre-wash stick cleaner
Inventors:
Roger C. Steinhauer, Isabelle M. Gabriel
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jun 4, 1980
Inventors
Roger C. Steinhauer
Isabelle M. Gabriel
Assignee (at issue)
Armour-Dial, 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.