Granted Patent
Utility
US 4,250,141 · App. 05/969,847
Column for the removal of undesired substances from a liquid mixture
Inventors:
Hans D. Lehmann, Peter Konstantin
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Dec 15, 1978
Inventors
Hans D. Lehmann
Peter Konstantin
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.