Granted Patent
Utility
US 4,861,707 · App. 07/010,056
Human immunodeficiency virus antigen
Inventors:
Lucinda A. Ivanoff, Steven R. Petteway
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Feb 2, 1987
Inventors
Lucinda A. Ivanoff
Steven R. Petteway
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.