Granted Patent
Utility
US 4,923,978 · App. 07/138,038
Process for purifying nucleic acids
Inventor:
Randy M. McCormick
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Dec 28, 1987
Inventor
Randy M. McCormick
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.