Granted Patent
Utility
US 6,047,731 · App. 08/750,545
Pressure fitting, in particular a pressure relief and safety valve
Inventors:
Hermann-Josef Conrads, Erwin Laurer, Juergen Model, Ullrich Preiss
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Mar 21, 1997
Inventors
Hermann-Josef Conrads
Erwin Laurer
Juergen Model
Ullrich Preiss
Assignee (at issue)
Siemens Aktiengesellschaft
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.