Granted Patent
Utility
US 4,854,827 · App. 07/101,149
Sanitary pump station
Inventors:
Edward McKiernan, James A. Sigler, Richard W. Sprang, Richard R. Lewellen, Mark W. Geis
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Sep 24, 1987
Inventors
Edward McKiernan
James A. Sigler
Richard W. Sprang
Richard R. Lewellen
Mark W. Geis
Assignee (at issue)
BellandTechnology 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.