Granted Patent
Utility
US 4,664,891 · App. 06/850,849
Dialysis solution preparation from prepackaged dry chemicals
Inventors:
Louis C. Cosentino, Wayne I. Nelson
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Apr 11, 1986
Inventors
Louis C. Cosentino
Wayne I. Nelson
Assignee (at issue)
Renal Systems, 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.