Granted Patent
Utility
US 5,876,997 · App. 08/910,798
Phytase
Inventor:
Keith Kretz
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Aug 13, 1997
Inventor
Keith Kretz
Assignee (at issue)
Diversa Corporation
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.