Granted Patent
Utility
US 6,276,613 · App. 09/511,176
Chemical foaming system for floor cleaning machine
Inventor:
Michael Kramer
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Feb 22, 2000
Inventor
Michael Kramer
Assignee (at issue)
Alto U.S. 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.