Granted Patent
Utility
US 5,062,979 · App. 07/406,984
Soap free conveyor lubricant that gives clear solutions in water comprising alkoxyphosphate ester, alkyl benzene sulfonate and carboxylic acid
Inventors:
Rolf Scharf, Karl-Heinz Schmitz
Patented Case
View Patent ↗
Granted: Nov 5, 1991
Filed: Sep 13, 1989
Inventors
Rolf Scharf
Karl-Heinz Schmitz
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.