Granted Patent
Utility
US 6,103,128 · App. 09/297,174
Method and apparatus for mixing gas with liquid
Inventors:
Arto Koso, Heikki Manninen
Patented Case
View Patent ↗
Granted: Aug 15, 2000
Filed: Apr 27, 1999
Inventors
Arto Koso
Heikki Manninen
Assignee (at issue)
Sulzer Pumpen AG
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.