Granted Patent
Utility
US 4,240,907 · App. 06/004,486
Dialyzer and method of dialysis
Inventor:
Donald J. Bentley
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jan 18, 1979
Inventor
Donald J. Bentley
Assignee (at issue)
Bentley 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.