Granted Patent
Utility
US 6,221,644 · App. 09/163,642
Polypeptides having phytase activity and nucleic acids encoding same
Inventors:
Randy Berka, Michael Rey, Alan Klotz
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Sep 30, 1998
Inventors
Randy Berka
Michael Rey
Alan Klotz
Assignee (at issue)
Novo Nordisk Biotech, 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.