Granted Patent
Utility
US 5,731,391 · App. 08/722,913
Fluid composition for physiological separations with enhanced resistance to inward migration of substances requiring accurate dosage monitoring
Inventors:
William Lawrence O'Brien, Alan C. Kilbarger
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Sep 27, 1996
Inventors
William Lawrence O'Brien
Alan C. Kilbarger
Assignee (at issue)
Henkel Limited
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.