Granted Patent
Utility
US 5,344,074 · App. 08/016,776
Dispensing apparatus having a removable variable proportioning and metering device
Inventors:
John R. Spriggs, James D. Decker, James L. Copeland, Spencer B. Larson
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Feb 11, 1993
Inventors
John R. Spriggs
James D. Decker
James L. Copeland
Spencer B. Larson
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.