Granted Patent
Utility
US 4,925,860 · App. 07/356,948
Stable pharmaceutical composition of 3-(hydroxymethyl)-5,5-diphenylhydantoin disodium phosphate ester
Inventors:
Dale E. Herbranson, Earl R. Speicher, Leonard Rosenberg
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: May 25, 1989
Inventors
Dale E. Herbranson
Earl R. Speicher
Leonard Rosenberg
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.