Granted Patent
Utility
US 5,622,708 · App. 08/028,349
Erodible sanitizing caulk
Inventors:
Francis L. Richter, Duane J. Reinhardt, Paula Carlson
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Mar 9, 1993
Inventors
Francis L. Richter
Duane J. Reinhardt
Paula Carlson
Assignee (at issue)
ECOLAB 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.