Granted Patent
Utility
US 5,222,514 · App. 07/773,811
Method of operating a gas sealing valve and valve equipped plastic processing installation
Inventors:
Bernd Klotz, Kurt Herzog
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Oct 9, 1991
Inventors
Bernd Klotz
Kurt Herzog
Assignee (at issue)
Krauss-Mafei 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.