Granted Patent
Utility
US 5,886,057 · App. 08/571,934
Production of dicarboxylic acids
Inventors:
James Lumsden Harvie, Stuart Michael Heppell
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jan 4, 1996
Inventors
James Lumsden Harvie
Stuart Michael Heppell
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.