Granted Patent
Utility
US 5,169,945 · App. 07/750,214
Amino protecting group
Inventor:
Leland O. Weigel
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Aug 19, 1991
Inventor
Leland O. Weigel
Assignee (at issue)
Eli Lilly and 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.