Granted Patent
Utility
US 4,897,417 · App. 07/285,006
Prodrugs of 3,4-hydroxy benzoyloxypropanolamines
Inventors:
Ghanshyam Patil, William L. Matier, Khuong H. X. Mai
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Dec 15, 1988
Inventors
Ghanshyam Patil
William L. Matier
Khuong H. X. Mai
Assignee (at issue)
E.I. DU PONT DE NEMOURS 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.