Granted Patent
Utility
US 4,824,668 · App. 07/023,612
Attenuated infectious bursal disease virus strain and vaccine therefrom
Inventors:
Fred W. Melchior, Jr., Lillian Melson
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Mar 9, 1987
Inventors
Fred W. Melchior, Jr.
Lillian Melson
Assignee (at issue)
Sterwin Laboratories Inc.
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.