Granted Patent
Utility
US 4,556,239 · App. 06/536,944
Arrangement at a shaft seal
Inventor:
Bengt Eriksson
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Sep 27, 1983
Inventor
Bengt Eriksson
Assignee (at issue)
Sala International Aktiebolag
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.