Granted Patent
Utility
US 5,145,583 · App. 07/632,388
Asymmetric semipermeable membrane for the treatment of biological fluids
Inventors:
Rene Angleraud, Claude Brun
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Dec 21, 1990
Inventors
Rene Angleraud
Claude Brun
Assignee (at issue)
Hospal Industrie
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.