Granted Patent
Utility
US 4,935,421 · App. 07/318,147
2-hydroxypropylamine aryl ester derivatives and pharmaceutical use
Inventors:
Sheung T. Kam, William L. Matier
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Mar 1, 1989
Inventors
Sheung T. Kam
William L. Matier
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.