Granted Patent
Utility
US 4,428,934 · App. 06/288,118
Method for oxygenating blood
Inventor:
Donald A. Raible
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Jul 29, 1981
Inventor
Donald A. Raible
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.