Granted Patent
Utility
US 5,316,688 · App. 07/699,688
Water soluble or dispersible film covered alkaline composition
Inventors:
Elizabeth J. Gladfelter, Tina O. Outlaw, James L. Copeland, Rhonda K. Schulz, Daniel K. Boche, Jeff W. Peterson
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: May 14, 1991
Inventors
Elizabeth J. Gladfelter
Tina O. Outlaw
James L. Copeland
Rhonda K. Schulz
Daniel K. Boche
Jeff W. Peterson
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.