Granted Patent
Utility
US 6,468,534 · App. 09/667,147
Methods for obtaining transfer factor from avian sources, compositions including avian-generated transfer factor, and methods of use
Inventors:
William J. Hennen, David Lisonbee
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Sep 21, 2000
Inventors
William J. Hennen
David Lisonbee
Assignee (at issue)
4Life Research, LC
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.