Granted Patent
Utility
US 4,960,896 · App. 07/120,488
Process for the preparation of 5-chloro and 5-bromo-2-hydroxynicotinic acids
Inventor:
Young S. Lo
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Nov 13, 1987
Inventor
Young S. Lo
Assignee (at issue)
A. H. Robins Company, Incorporated
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.