Granted Patent
Utility
US 4,264,471 · App. 06/045,182
Serum and plasma clarification process
Inventor:
Anglis R. Briggs
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Jun 4, 1979
Inventor
Anglis R. Briggs
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.