Granted Patent
Utility
US 5,866,401 · App. 08/805,087
Porcine reproductive and respiratory syndrome vaccine
Inventor:
Richard A. Hesse
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Feb 24, 1997
Inventor
Richard A. Hesse
Assignee (at issue)
SCHERING CORPORATION
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.