Granted Patent
Utility
US 4,253,967 · App. 06/028,531
Blood treating method
Inventor:
Donald A. Raible
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Apr 9, 1979
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.