Granted Patent
Utility
US 4,814,073 · App. 07/087,146
Dialysate preparation apparatus with improved control
Inventor:
David R. Shouldice
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Aug 19, 1987
Inventor
David R. Shouldice
Assignee (at issue)
Cobe Laboratories, 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.