Granted Patent
Utility
US 4,709,042 · App. 06/909,140
Process for the preparation of 2-(1-hydroxyalkyl)-5,5-diphenylhydantoin
Inventors:
Khuong H. X. Mai, Ghanshyam Patil
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Sep 19, 1986
Inventors
Khuong H. X. Mai
Ghanshyam Patil
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.