Granted Patent
Utility
US 5,667,990 · App. 08/458,023
Aspergillus expression system
Inventors:
Randy Berka, Wendy Yoder, Shinobu Takagi, Karuppan Chettier Boominathan
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Jun 1, 1995
Inventors
Randy Berka
Wendy Yoder
Shinobu Takagi
Karuppan Chettier Boominathan
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.