Granted Patent
Utility
US 6,557,834 · App. 10/152,867
Device and method for fluid aeration via gas forced through a liquid within an orifice of a pressure chamber
Inventor:
Alfonso Ganan-Calvo
Patented Case
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Granted: May 6, 2003
Filed: May 20, 2002
Inventor
Alfonso Ganan-Calvo
Assignee (at issue)
UNIVERSIDAD DE SEVILLA
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.