Granted Patent
Utility
US 6,500,662 · App. 09/470,661
Infectious cDNA clone of North American porcine reproductive and respiratory syndrome (PRRS) virus and uses thereof
Inventors:
Jay Gregory Calvert, Michael G. Sheppard, Siao-Kun W. Welch
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Dec 22, 1999
Inventors
Jay Gregory Calvert
Michael G. Sheppard
Siao-Kun W. Welch
Assignee (at issue)
Pfizer 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.