Granted Patent
Utility
US 6,241,211 · App. 09/480,851
Plate valve
Inventors:
Heinz Frey, Kamil Prochazka, Franz Suter
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Jan 11, 2000
Inventors
Heinz Frey
Kamil Prochazka
Franz Suter
Assignee (at issue)
ABB Alstom Power (Schweiz)
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.