Granted Patent
Utility
US 4,935,141 · App. 07/235,373
Selectively permeable asymmetric membranes suitable for use in hemodialysis and processes for manufacturing such membranes
Inventors:
Reinhold Buck, Hermann Goehl
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Aug 23, 1988
Inventors
Reinhold Buck
Hermann Goehl
Assignee (at issue)
Gambro Dialysatoren GmbH
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.