Granted Patent
Utility
US 4,383,039 · App. 06/329,227
L-Proline production from algae
Inventor:
Richard I. Leavitt
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Dec 10, 1981
Inventor
Richard I. Leavitt
Assignee (at issue)
Ethyl 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.