Granted Patent
Utility
US 4,414,404 · App. 06/357,232
Process for producing N-acyl-D,L-phenylalanine ester
Inventor:
Jerry M. Roper
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Mar 11, 1982
Inventor
Jerry M. Roper
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.