Granted Patent
Utility
US 6,019,873 · App. 09/042,011
Floor absorbent granular product
Inventors:
Edward G. Knapick, Brent Willemsen, Ernest P. Wolfer, Michael C. Bonin
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Mar 13, 1998
Inventors
Edward G. Knapick
Brent Willemsen
Ernest P. Wolfer
Michael C. Bonin
Assignee (at issue)
Marcal Paper Mills, 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.