Granted Patent
Utility
US 6,500,438 · App. 08/973,133
In ovo vaccination against coccidiosis
Inventors:
Nigel A. Evans, Robert Craig Findly, Frederick H. Weber
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Dec 1, 1997
Inventors
Nigel A. Evans
Robert Craig Findly
Frederick H. Weber
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.