Granted Patent
Utility
US 4,836,037 · App. 07/063,493
Sample metering valve for a sample preparation system
Inventors:
Andre J. Nohl, Vance J. Nau, Andre Metzger
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Jun 16, 1987
Inventors
Andre J. Nohl
Vance J. Nau
Andre Metzger
Assignee (at issue)
Ciba-Geigy
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.