Granted Patent
Utility
US 4,945,172 · App. 07/442,040
Preparation of N-formyl-L-aspartic anhydride
Inventors:
John B. Hill, Hugh L. Dryden, Jr., Robert A. Erickson
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Nov 28, 1989
Inventors
John B. Hill
Hugh L. Dryden, Jr.
Robert A. Erickson
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.