Granted Patent
Utility
US 4,946,988 · App. 07/219,613
Process for the preparation of .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride by use of isolated N-formyl L-aspartic anhydride
Inventors:
John B. Hill, Yefim Gelman
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Jul 14, 1988
Inventors
John B. Hill
Yefim Gelman
Assignee (at issue)
The NutraSweet 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.