Granted Patent
Utility
US 4,326,030 · App. 06/100,395
Process for the production of pyruvic acid and citric acid
Inventor:
Refaat M. El-Sayed
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Dec 5, 1979
Inventor
Refaat M. El-Sayed
Assignee (at issue)
Diamond Shamrock Corporation
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.