Granted Patent
Utility
US 5,845,633 · App. 08/754,155
Dosing device for adding a controlled amount of a gas to a fluid
Inventor:
Georgios Psaros
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Nov 22, 1996
Inventor
Georgios Psaros
Assignee (at issue)
Siemens Elema AB
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.