Granted Patent
Utility
US 5,259,557 · App. 08/032,838
Solution proportioner and dispensing system
Inventors:
John R. Spriggs, James D. Decker, James L. Copeland, John E. Thomas
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Mar 10, 1993
Inventors
John R. Spriggs
James D. Decker
James L. Copeland
John E. Thomas
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.