Granted Patent
Utility
US 6,227,239 · App. 09/471,130
Spring-loaded safety valve
Inventors:
Monika Abrell, Olaf Hunger, Jörg Peter, Lukas Zehnder, Christian Dahler
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Dec 23, 1999
Inventors
Monika Abrell
Olaf Hunger
Jörg Peter
Lukas Zehnder
Christian Dahler
Assignee (at issue)
Asea Brown Boveri, S.A.
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.