Granted Patent
Utility
US 4,786,433 · App. 06/881,088
Method of preparing phosphorous-free stable detergent emulsion
Inventors:
Linda L. Marquardt, Cheryl A. Hall
Patented Case
View Patent ↗
Granted: Nov 22, 1988
Filed: Jul 2, 1986
Inventors
Linda L. Marquardt
Cheryl A. Hall
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.