Granted Patent
Utility
US 5,912,214 · App. 08/940,690
Smokeless two-cycle engine lubricants
Inventors:
Eugene R. Zehler, Bruce J. Beimesch
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Sep 30, 1997
Inventors
Eugene R. Zehler
Bruce J. Beimesch
Assignee (at issue)
Henkel Limited
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.