Granted Patent
Utility
US 5,244,589 · App. 07/642,056
Antimicrobial lubricant compositions including a fatty acid and a quaternary
Inventors:
Chung-Tsing Liu, Joseph C. Dirksen
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Jan 16, 1991
Inventors
Chung-Tsing Liu
Joseph C. Dirksen
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.