Granted Patent
Utility
US 4,790,976 · App. 06/894,693
Device for installing dry PDD lances and for flushing out lance-housing tubes in boiling water reactors
Inventors:
Artur Zahn, Karl Hannappel
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Aug 8, 1986
Inventors
Artur Zahn
Karl Hannappel
Assignee (at issue)
Kraftwerk Union 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.