Granted Patent
Utility
US 4,957,714 · App. 07/187,111
Solvent extraction process
Inventors:
Stephen M. Olafson, Roy G. Lewis, Gary A. Kordosky
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Apr 28, 1988
Inventors
Stephen M. Olafson
Roy G. Lewis
Gary A. Kordosky
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.