Granted Patent
Utility
US 4,935,140 · App. 06/937,447
Membrane and process for producing the membrane
Inventors:
Peter Konstatin, Hermann Gohl, Maria T. Ohmayer, Reinhold Buck, Claes-Ake Gullberg
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Dec 5, 1986
Inventors
Peter Konstatin
Hermann Gohl
Maria T. Ohmayer
Reinhold Buck
Claes-Ake Gullberg
Assignees (at issue)
Gambro Dialysatoren GmbH
GAMBRO LUNDIA AB
Gambro, 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.