Granted Patent
Utility
US 4,447,616 · App. 06/445,537
Pyridine containing benzoic acid derivatives
Inventors:
William M. Hung, Edward E. Ehlinger
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Nov 30, 1982
Inventors
William M. Hung
Edward E. Ehlinger
Assignee (at issue)
Sterling Drug, Inc.
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.