Granted Patent
Utility
US 4,793,942 · App. 07/001,397
Detersive systems with a dispersed aqueous-organic softening agent for hardness removal
Inventors:
Keith D. Lokkesmoe, Keith E. Olson
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Jan 8, 1987
Inventors
Keith D. Lokkesmoe
Keith E. Olson
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.