Granted Patent
Utility
US 5,426,219 · App. 08/096,939
Process for recovering organic acids
Inventors:
William F. Lehnhardt, Robert V. Schanefelt, Lori Napier
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Jul 26, 1993
Inventors
William F. Lehnhardt
Robert V. Schanefelt
Lori Napier
Assignee (at issue)
A.E. Staley Manufacturing Company
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.