Granted Patent
Utility
US 5,196,138 · App. 07/419,966
Preparation of mixed lithium amide reagents
Inventor:
W. Novis Smith
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Oct 11, 1989
Inventor
W. Novis Smith
Assignee (at issue)
Cyprus Foote Mineral 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.