Granted Patent
Utility
US 5,092,699 · App. 07/662,984
Floor cleaning using index fabric rolls in removable cassette
Inventor:
Scott A. Silvenis
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Feb 28, 1991
Inventor
Scott A. Silvenis
Assignee (at issue)
Dow Brands 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.