Granted Patent
Utility
US 4,560,653 · App. 06/501,421
Process for preparing L-aspartic acid
Inventors:
Martin B. Sherwin, John J. Blouin
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Jun 6, 1983
Inventors
Martin B. Sherwin
John J. Blouin
Assignee (at issue)
W. R. Grace & Co.
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.