Granted Patent
Utility
US 5,766,439 · App. 08/752,803
Production and recovery of organic acids
Inventors:
Aharon Eyal, William F. Lehnhardt
Patented Case
View Patent ↗
Granted: Jun 16, 1998
Filed: Nov 20, 1996
Inventors
Aharon Eyal
William F. Lehnhardt
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.