Granted Patent
Utility
US 5,490,428 · App. 08/113,137
Metering of liquid substances
Inventor:
Dieter Durr
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Aug 30, 1993
Inventor
Dieter Durr
Assignee (at issue)
Linde 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.