Granted Patent
Utility
US 6,478,574 · App. 09/621,257
Pump purge for oil primary
Inventors:
Amy L. Melcher, Richard Simons, Henry E. Troost
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jul 21, 2000
Inventors
Amy L. Melcher
Richard Simons
Henry E. Troost
Assignee (at issue)
HONEYWELL INTERNATIONAL INC.
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.