Granted Patent
Utility
US 5,919,461 · App. 08/653,798
Nonpathogenic infectious bursal disease virus and vaccine
Inventors:
Piet Van Der Marel, Martinus Antonius Johannes Thijssen, David B. Snyder, Dieter Lutticken, Ruud Hein
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: May 28, 1996
Inventors
Piet Van Der Marel
Martinus Antonius Johannes Thijssen
David B. Snyder
Dieter Lutticken
Ruud Hein
Assignee (at issue)
AKZO NOBEL N.V.
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.